Found this excellent post thanks to Guy’s Comic Commentary blog–
To start discussion or provide an alternative point of view. Beware, though, this may work against writing a good review, if the reviewer winds up discussing plot and characters too fannishly just to get responses. Also, reviewers shouldn’t cop an attitude just to get noticed. Attitude is cheap; content is rare.
Yes, the post is regarding comic books but it seems like the same principles apply toward any literary review.