[quote=@KOgaming]
So bad decks are fun?

Everyone's free to choose whatever cards they want and create any three custom cards. Nobody forced you to make your deck the way it is.
[/quote]

...Yes, bad decks are fun. Look at the anime and just [i]try[/i] to make a functional deck out of the cards they use.

Even a well constructed deck can be fun if it allows for some back and forth. Most of these don't, though. Zombie Synchro and Skull servants seem like the only two that do.

Like, if I join a YGO RP, I don't join to play the actual game. I join to recreate the anime hype moments of dumping a big dumb monster and crashing it into your big dumb monster, or topdecking into some obscure 8-card combo you'd never pull off IRL.

If you want to play good, competetive decks go play YGOPro percy/YGOpro devpro or go to IRL locals. 

EDIT: I'll clarify a bit more. What makes a deck fun to write out in an RP setting isn't the scale on how good it is, it's how hype it can write itself out. If your deck is some OTK deck that just wants to end it in one turn, that's kinda boring and stale. If it's a floodgate deck that locks you down, then it doesn't make for an interesting duel. If it's something that plays for too long that gets really, really boring to read.

You want something that gets to the point fast and sticks to its guns. The level 5 or higher deck was all about summoning big monsters quickly and replacing them with bigger monsters if they went down, never letting up on high ATK value. The Xyz deck is about being unpredictable and summoning really cool Xyz monsters using a random assortment of monsters, all the while backing it up with thematically fitting cards.

If I were to take something I haven't played, let's go with... Ah, what the hell, Dragon Rulers. There's two ways you could go about it: Rank 7 spam like we're back in the old format, or keeping 1-2 rulers on the field at the time, maybe go into an Xyz, but leaving room for your opponent to counterplay.

The former would be boring as the deck would crush everything, but the latter would be fun because big dumb dragons fighting other dumb monsters and then coming back to fight some more.