Galleycat has a list of negative book review cliches:

1. "cardboard characters"
2. "thin plot"
3. "cookie-cutter characters"
4. "the book falls apart at the end"
5. "I just didn't *care* about the characters."

Readers added more criticism cliches in the comments, including the critic reporting that he or she threw the book across the room. I totally agree with that one. There are so many books being thrown across the room on book blogs these days that I can't help but imagine a book-critic Olympics involving a book shot put competition. Writing negative book reviews can be awfully fun, but if you employ one of these cliches in your review, you're messing up your own case even as you make it.