That is your problem and many others do the same thing. You are focusing on the wrong thing in game reviews. If there is a game I think I may be interested in, I will look at the score, but then read the review to understand WHY it was scored that way. Still one of my favorite games on PS3 is Bionic Commando. Only about a 70 rating overall, but I read about it, bought it and really enjoyed it.
Oh I do read the reviews and try to figure out why they scored a game that way, but it also seems like a lot of games tend to get shafted by reviewers nowadays for no reason. Like with Nier's case, reviewers bitched about everything in that damn game except for the soundtrack, but I tried it and had no problems with about 90% of the things reviewers were bitching about.
It just seems that reviewers have become less reliable to me.