Having even pocket aces will get you beaten plenty. It always depends on what you're looking at after the flop, and what another player may simply have that tears up your hand with an ace or two. The more players that stay in on a hand, the more likely of a chance one of them may be holding the winner needed to crack whatever ace combo you've got. Feel safer when you have aces over anything with a full house, or of course if you have quads. Other than that, watch out !