I don't read a lot of fic because I think the voices are really hard to nail and I can be fussy about that sort of thing.

Just butting in to say that... that is my other main reason for not reading a whole lot of fanfiction. I obviously read more when university didn't eat me up, but for me, characterization is a number one priority, and even on games and ships I like, I can't read very far into a fic that doesn't gel. It's not just an FF phenomenon. I'm notoriously picky in all my fandoms. Sometimes, I resent that, though, because I want to like more fics and just lose myself in little stories. Sigh.