I'm underplaying it on purpose in these situations because I want the PFR to think he's ahead and spend 2 streets betting at me before he figures out he isn't. I think this is a lot more profitable than throwing in a raise that will only get called by better hands. But then again, I'm not in love w/ AK; I definitely don't think its the 3rd best hand in hold'em. I'm behind to any pocket pair and good players can take advantage of this, and I generally only expect to get called by pocket pairs. If I know someone has AK in their reraising range, I'm more than happy to call with a pocket pair and c/r the flop and/or float and take the pot on the turn if they didn't hit, because around than half the time they'll have AK rather than an overpair. The only times I really expect to win a big pot with it is when I have someone dominated and they don't know it, but if I reraise I run out all of those hands.