I've always liked the reviews coming out of Nintendo Power for Nintendo games. Anything that ranks 7.5 or above is pretty decent. I agree that the numbers don't mean that much but at least I can identify a lower bar (7.5) that I look for.
I catch episodes of X-Play for the rest of my game reviews. They seem to have a good grasp on what is crap and why its crap as well as what's good.