I rarely if ever trust review sites and I never buy games based on a review, with one exception (Zero Punctuation
), and never buy without looking around (or without Yahtzee's approval given we appear to have similar tastes). I think it mostly comes down to reviewers not reviewing games of their preferred style/genre etc. meaning that a very good RPG could be reviewed by some guy who liked an RPG once but prefers FPS, making their opinion useless as far as an RPG gamer goes.
EDIT: I also seriously recommend that you check out the Zero Punctuation video reviews if you haven't already, even if just for their entertainment value Edited by DirektEffekt - 10/24/11 at 7:40am