I'm a numbers guy as well. I like to keep things in boxes, so to speak. I know where I stand with a 'seven', or 'eight'. At least, my interpretation of those numbers anyway.
The thing with me is that I have played many games that are simply 'better than the sum of their parts'. Take Dynasty Warriors, for example. These games would never get a very high score on mainstream review sites. Like, a seven, even a six perhaps. However, I really love those games, no matter the scores. They are never going to be 'amazing', but I love them nonetheless.
Reviews are useful. I like them. If there's a game series I haven't played before, I'll read them, but if I'm pretty devoted to a series, I'll buy that game regardless. Personally, I quite like trying a game out first, or at least seeing someone else play it first and see if I get that 'feeling'. It's hard to describe, but it's a feeling you get when you know you're going to enjoy that game. That beats any review, in my opinion.