They all suck.
The worst ive found so far has to be the ones for Cartoon Network or anything else thats kid oriented. Its great if you want to read some Naruto fanfiction written by 11 year olds with ADHD and Manic Depression.
Speaking of fanfiction---
http://www.adultfanfiction.net (So very NSFW) This makes me sad at the state of humanity.