What the title implies...Was curious, and you can never have enough music discussion. ;D

So, has either of these two situations happened to you?
A. You listen to a song for the first time and dislike/hate it but after repeated listens you actually end up liking/loving the song.
B. Music you used to listen to and enjoy, but for some reason or another, can no longer stand it/hate the song.

Both have happened to me, and I'll provide examples. :P

Well the band that did this to me the most often, throughout my life was Linkin Park.

By myself Hated this song as a kid, because I didn't like the screaming on it/backing track to it. (Yep, was one of those people.) Now I find it alright, still is probably one of the weaker tracks to be fair.

Bleed it out I fucking loathed this song the first few listens, but not really sure why. This one I've 180'd on.

Linkin park - Thousand suns (in general really) Hated all of it when I first heard it, didn't help that my older brother jumped on the, "they matured from screaming and are making better smarter music now." (Yep, pop music is the smartest genre and don't you forget it...*drools* People saying that outgrew a whole genre, is something that drives me nuts. *side rant over*) Then I gave it a second chance and just hated the first half. And now even though I acknowledge all of it's problems and it actually has the dumbest lines they ever recorded. I like the album as a whole now.

I have more examples, of music that took a few listens to like. However, I don't have many songs I used to like that I hate. (I'd argue my taste in music has only gotten dumber with age/maturity, because I care way less about high lyrical quality.) But one song I liked a lot as a kid, but I really don't like it anymore. (and not really sure why.)
Sheryl Crow-Soak Up The Sun

So how about all of you? (Hopefully someone else has this problem. XD)

I used to listen to System of a Down daily. It was almost like a religious thing for me. Cut to a few years later, and I honestly can't stand them anymore. They write these ridiculous lyrics in an attempt to be really esoteric and subversive, but it's just total nonsense. Whatever meaningful message they're trying to convey is just lost in their inane gibberish.

On the other hand, when I was about 14-15 I hated any kind of metal with extreme vocals. Thought it sucked. Cut to me ten years later and while I certainly do enjoy clean vocals, I have discovered plenty of more extreme bands I love and listen to.

I used to think Dragonforce was good and then I turned 15.

I used to love Celtic Music. That was before I realized the vast majority of Celtic music artists on YouTube are just some nerds shoving nature noises and badpipes into a sound synthesizer and calling whatever the program craps out "Celtic."

I still like actual Celtic music, but I find it much safer to look up traditional Scandinavian music, even though there are pitfalls to that idea as well, such as white supremacist comment sections.

(No, seriously. You don't get much more racist than a comment section for a Viking song on Youtube.)

Also, I stopped liking Rap when I was 13, then started liking it again when I turned 18. I now like some Rap, much like I like some of pretty much all popular music genres.

I used to like lullabies and then I turned 7.

I used to think Dragonforce was good and then I turned 15.

B-but there The Power Within album had like 2 good songs on it. :c

Both of those songs were Through the Fire and Flames.

All Dragonforce songs are Through the Fire and Flames.

Oooh! I thought of another one!

Gamma Ray. German Power Metal legends! I first started listening to them around 06/07, but asides from a few tracks I just couldn't get into them. Fast forward to 2013, and I decided to give them another go. I downloaded a compilation album and listened to it and I don't know...something just clicked and now I fucking love them.

Back in the day, I was really in love with (Hed) P.E and Linkin Park, and Metallica. When I turned 16 or so, my love for those three bands faded, and I found better music. Around that time came when I stumbled upon Dream Theater, Iced Earth, and Machine Head. While I still occasionally listen to Hed PE and Linkin Park, I've fallen out of love with Metallica; though, my tastes have always fluctuated differently. I often fall back into my emo roots and sometimes I get into a mainstream pop/top 40 obsession. I guess I'm weird like that.

Hell yeah. Iced Earth.

Actually found myself listening to a lot of Metallica lately. Nothing after their self-titled though. Love or hate that album, it has the best production of any heavy metal album ever, and with such a tight bunch of songs. I know a pretty vocal contingent of Metallica purists like to shit on that album, but as far as I can see there's an incredibly valid reason they took it on tour for three whole years.

@Gelatinous Cube I admit that I started listening to them right when Barlow left the first time, but at the time, I did get a good amount of their songs downloaded, and boy oh boy did I fall in love with that guy's vocal range. Lord oh mighty, it's like the Gods blessed him. Absolutely love Horror Show and The Dark Saga. Definitely my favorite albums by them bar none.

I was sitting here thinking "what self-titled album?" - and then I remembered that's what they called what most refer to as "The Black Album." And you're absolutely right. You can love it or nah, but no one can't deny that it is, to this day, one of the greatest Heavy Metal and/or Hard Rock albums ever produced track by track. I personally love "Nothing Else Matters". Call me a simple man, but James with that acoustic guitar in the beginning is the most beautiful arrangement of any 1990s song I've heard. Enter The Sandman is another great one. I believe that was the first Metallica song I heard, if memory serves.

I discovered Nightcore when I was in middle school and despite being aware of the absolute anime cringe, I took part in the listening phenomenon. While I might still listen to it today (mostly as a joke to blast "Crawling" with high vocals and speedy-fast goodness on Skype calls), I don't consider it to be something that I still "like".

@Altered Tundra Matt Barlow is an absolute legend. And not just for his range either. Few vocalists can deliver such an impassioned performance like he can. Perfect example: A Question of Heaven.
The Dark Saga is my favourite Iced Earth album too. :D

Stu Block in his own right is an incredible vocalist with a fantastic range, but I can't help but feel he's woefully underutilized in Iced Earth. Jon seems happier to have him do a (to be fair, quite good) Matt Barlow impression rather than let him come at the songs his own way. I was personally hoping for a return to Night of the Stormrider's sound, which I think Stu would have absolutely nailed, but Dystopia still turned out to be a pretty enjoyable album. Wasn't so into Plagues of Babylon, but it too had some decent material.

@Gelatinous Cube Oh yess sir(please tell me I guessed right XD), you are absolutely right. In both the Alive in Athens live CD AND the album version, I can literally feel the emotion and desperateness in his voice. I feel as if Barlow himself is asking God why it turn out like this? Legit, if a singer can do that, then you know he's one of a kind artist there. And that's why when he left the second time, I was a bit conflicted. It's true that his heart wasn't in it, but I feel like, compared to Barlow, Block is just slightly less-than good. I mean, Block is a fantastic singer and has been able to add his own unique spin to Iced Earth's songs, but it's just not the same, ya know?

I definitely feel ya there. Dystopia was a great showing of Block's vocals. I definitely feel like the first five tracks on that record were the best, with Dark City and the title track, Dystopia, being my top favs. I especially love that instrumental in the second half of Dark City. I can agree with you there about Plagues of Babylon. It's a good album, yes, but just not as good as Dystopia. The title track for that album is pretty solid. Can't think of any others that are on the level of it, though. Maybe that's an indication of how underwhelming the album is. xD

You know, I gotta be honest (and since it's the subject of the thread :P), I wasn't too keen on Dream Theater first time around. A friend of mine sent me Learning to Live and told me how great it was. I listened to it and liked it, but it just wasn't what I was expecting, so it didn't resonate with me too well.
A few years later I give them a go, and listen to Forsaken. I really dig it and go back to Images & Words and listen to Pull Me Under, Take the Time, Another Day and give Learning to Live another go.

Now I think Learning to Live is one of the greatest songs ever written and I cannot pick a single Dream Theater song I don't like in some way.

@Gelatinous Cube
I can't say that was the same for me. I fell in love with Dream Theater from the get go. Systematic Chaos was the first album I bought from them. The Dark Eternal Night, though the vocals were ran through audio filters a bit too much, I think it was still a very solid track. However, I just can't get over how wickedly-haunting Metropolis p2: Scenes From a MEmory was. Track-to-track, it was a wonderful listen.

As for Learning to Live, I'll have to go back and listen to it because I don't remember the song that well. As far as the best Dream Theater song. For me, I would place my bets on These Walls. I don't know if you feel similarly, but I personally go back and listen to that song as much as I possibly can. It's not only one of my favorite songs off of the Octavarium album, but I would place it in my top five Dream Theater songs. Honestly, that entire album has a lot of great songs. Probably my favorite DT album thus far. Of course, I haven't been able to grab their latest effort, so I may feel differently after I do.

I always acknowledged Octavarium, but never really gave it enough respect until recently. I passed it off as being too mainstream sounding, which on the surface it was. It's not until you actually take the time (hurrdurr) to really listen to it that you start to understand how much more complex it is.
And yes, These Walls was one of the first tracks on that album that made me take notice.
Although, I gotta say, a lot of Dream Theater's latter day stuff didn't grab me at first. Train of Thought, Octavarium and Systematic Chaos took a while for me. So did Six Degrees (despite The Glass Prison being my favourite DT song).

My absolute number 1 is still Awake though. That to me is probably the most encompassing album, and the strongest in terms of songwriting and performances. It was heavy, it was dark, but it was still melodic and it pushed their sound further outwards.
Then it's Images & Words, and then Scenes From a Memory.

@Gelatinous Cube Actually the power within had a little variety, but it was a little too few to be anything noteworthy, but it had several songs that had a slower pace making the songs have actual melody vs just the sound off showing off like they usually do. :P

@Shorticus Am I little scared to hear what Celtic music you were listening too...There's plenty that exists that isn't fake sounding at all, especially genre mixing like Celtic metal or rock. Even stand alone, I'm not sure if I've ever heard fake Celtic instruments beside maybe like electronica used for pop or rap songs. o.o

@Cynder B-but nightcore is love and life...D: (Lol, understandable. xP)

<Snipped quote by SleepingSilence>

Oh, that brings back memories. I was really into LP when I was younger. I never really got into music until I got into music. I can really appreciate artists who write their own music and play their own instruments. None of that Milli Vanilli crap. To many popular artists today are little more than window dressing for more talented musicians who work tirelessly behind the scenes to make them sound good.

I guess I could say that there were some instrumentalists that I listened to when I was younger who my opinions have changed about. Like Miles Davis. I was all aboard his hype train when I first started getting into jazz. But man, sometimes he could just be too experimental. Whenever he really had a thing, it seemed like he'd immediately abandon it without ever developing it. And I just hated Ornette Coleman. Now, genius. Mostly.