I'm a general fanfiction reader. I mostly read harry potter fanfic, as I've seen very few quality works in other fields... not that all of HP-fic is gleaming either.
I'll read good action/adventure, horror, dark-stories, smut (oh god yes the smut!), and really most anything that's well written and makes some sort of sense; I'd rather read a horribly cliched story than an inventive one with atrocious grammar and spelling. It's not much use trying to read the inventive one if I can't let myself enjoy it because I'm too busy trying to figure out just what the hell the author is trying to convey.