When I was in elementary school, I was deeply, deeply into the Redwall series by Brian Jacques. There was actually a point, around grade five or six, when I would exclusively read Redwall books, starting again with the (chronologically) first book in the series when I was done with the last.
It took me a while to regain my senses and realize just what was so awful about the Redwall books, and I was actually planning on writing a long and detailed rant about why I think they were too black-and-white.
It seems that SomethingAwful.com beat me to it: http://www.somethingawful.com/index.php?a=4270 . It explains everything I hate about the series, and more!