I very rarely buy any of them any more, it used to be a monthly thing with PC Gamer, mabye the PS3 magazine, or the xbox 360 one, depending what was in it.
I didnt buy Gamer for ages, then I saw they had FC2 in it............... I have not bought it since, and wont ever again.
I bought Games TM this month with, it reviews Halo wars, Killzone 2 and a some random JRPG nonsense.
Their marking criteria seems to be, If its a big game, with some hype behind it, knock 2 points of the average score given by everyone else, if its some obscure Japanese RPG that belongs on the snes circa 1993, then give it 10 out of 10, no matter how good it is.
Been like that the last 2 issues I've bought.