Hm, I am really sick of people bashing reviews.
I base my choice of whether or not to buy games ENTIRELY based on reviews. I won't form an opinion on a game until I have played it obviously, but my purchases are decided entirely by reading professional reviews by people who know what they are talking about. My opinion might be different from theirs, and I might miss out on a couple of gems, but for the most part it has helped me make wise decisions and without reviews I would be lost.
Fact is, the less people who like something, the less likely it is that I am going to like it. Not because I just follow the crowd, but because when something is shit, most people generally recognize that it's shit. There are hugely overrated games, sure (Call of Duty, Halo, Gears of War etc) but none of those games are shit. Actual shitty games that I won't even want to play are recognised by the majority as shit, and after reading reviews and seeing thoughts and facts stated about a game I have a general idea of if I am going to like it or not.
I know scores are useless (I always read the reviews rather than looking at scores) but here is a test for people who hate reviews: name me a couple of games that have an aggregate score of below 50/100 on Metacritic that you actually consider to be good games. Go on, I dare you. You might find a couple, of course there are going to be exceptions. But I think unless you have an extremely niche taste in games, you're going to have trouble finding more than 3-5... There's a reason for this, guys. The majority are not as stupid as you all think they are. Not many people are going to play a truly crap game, and that alone makes the chances of me enjoying it much slimmer simply by process of elimination.