AKs is a pretty big hand UNLESS you think youre up against AA or KK, and you're still a coinflip against pocket pairs so dont OVERvalue this hand. You said a rock reraised you 4x your "big" preflop raise... What does that mean to you?? Most likely he has AA or KK. Even if he has QQ do you really want to coinflip for that amount out of position? And unless you flop a flush (118 to 1 against) youre still guessing. Most of the power in AK lies in making the OTHER guy decide if he wants to coinflip or not preflop , if he puts it back on you youre most likey beat and should fold. Overplaying AK is a leak in alot of players game, fix it and you'll be ahead of all of them.