Oh wow, great question!
The roleplays that I like are ones that either science fiction (any sub-genre but post-apoc. is lovely), fantasy (paranormal and supernatural kind), action, eheh... romance... Aside from genres, I like doing fandoms with OCs and canon cameos in the mix, pairings, and anything original, really.
I think that's all very vague but it's because I'm extremely opening to almost everything. :)
How about you, Ellri?