I read a lot of RPG reviews from many good sources – RPG.net is my favorite, but there’s a lot of places hosting them out there. I’ve written a fair number of RPG reviews myself over the years.
Roger Ebert has issued a blog post called “Roger’s little rule book” for film critics, describing ways in which he feels film reviewers should write and behave in order to best serve the public who reads their reviews. I think many of his points are equally valid for RPG reviews! Except that no one’s flying RPG reviewers anywhere first class, sadly. Anyway, if you write reviews, give it a read.