[meme] name two fanfic tropes (or just tropes in general) and i'll tell you which i like better

That's always fun.

Hmm... roleswap AU versus mirror universe AU?

Crossover vs. fix-it fic

Echo : Roleswap. It just feels like there's more thought put in, even though I know that isn't always true.

UnlimBrainWorms : Fix fic, usually.

Fluff vs. Crack

NekoIncardine : I'd say fluff since it's more likely to be good with characterization, but crack is fun and I miss it.