I couldn't get past the first few eps of bleach. really. For favourite fight, most recently I've gotten into fate/zero, which has a couple awesome ones. Animation-wise too. Especially animation-wise. These dudes have a ton of budget to blow :P
For the more shounen-side of things, check out Law of Ueki. It's... Weird, but has some awesome ideas. I mean one dude fights with the ability to turn towels into steel, but uses that transition very strategically, by wrapping bombs into them, throwing them as steel boomerangs for the extra momentum and then reverting it to towels to release the bombs. It's really weird, but also funny. Although as always, don't expect too much from the plot :P
Another series that has some great fights is the Third. It has this tank, fighting a helicopter... And it's just that awesome. I can't explain it without showing it, but it's brilliant.
@Rose Swan Ehehehehe. That distracting, the site is, eh? I was wondering why you kept talking about that laptop. Oh well. We'll hold out a bit longer.