I'm not that big on fanfiction on any medium, be it cartoons, video games, etc. There are a few stories here & there that I really like because they make an effort to avoid OOC moments & it wrote it in a way that you would totally believe it could play out that way because of the care they took in understanding the characters, story, setting, an all that good stuff.
Unforuntely there are way too many stories that try to push a unlikely pairing or try to cement an established pairing in a completely OOC manner. And my biggest pet peeve, self insertion...There's nothing lamer IMO!
I dunno, it's very hard to really get into fanfiction because outside of short one-shots, it takes a bit a time to read & decide wheter you like the story or not, whereas with fanart, you can make a judgement within 3 seconds of view the pic.