Of course the rating ain't everything. Here, I can always try the game in my game store. Then just to feel it, I loan the game and if I want to buy it, I could with a 10%~15% price cut since I've loan the game before. xD
Mmm, for example, when they rate a shooter 10/10 and a hack and slash or an RPG low, I just give up on the ratings since they complain about repetition in hack and slash games.