Again, I think many people here are missing the point here. From his very first review, Yahtzee has been different in that he focuses on the things that deaden the game experience, or make the game less enjoyable. In some respects, Yahtzee has a theoretically much easier job with his reviews: The good aspects of a game vary for most (some would rank story, gameplay, graphics as their most important quality or some prefer a mix), but the things that make a game bad (poor programming, lazy texturing, strange dialogue, weird gameplay mechanics) are usually easy to agree upon. Yahtzee just has to then interject his trademark humor into the mix, and BLAM! instant classic.
Unfortunately, basing your choice of games on Yahtzee's approval alone means you are not a gamer at all. You would probably own The Orange Box, Call of Duty 4, Psychonauts, Painkiller, and Saints Row 2 (judging on games (that I can remember) that had positive receptions), and that's it. This brings me to my point: The best review is the one you give yourself. You will find aspects you can't stand, things you absolutely love, and decide if you really like this game. Often this happens after you've bought the game, so it's too late to make any budget constraints; but things like demos, previews, videos, and Gametap rentals help that. Instead, do what I do: laugh your ass off at Yahtzee and how funny he is when he lampoons a game.
But, hey, what do I know; I only read game reviews to give me selfish vindication that "Damn, I liked this game. I'm glad people agree with me."