You should play AA the same as you would the rest of the hands in your range. So, if you are the first to enter the pot, then you should raise whatever amount you typically do (2.5-3 BBs). If there are limpers in front of you, then you want to make a pot sized bet. If there is a raise is front of you, then you want to make a pot-sized 3 bet.
If it makes it to the flop, then you want to bet the same as you would the rest of your range in that position IF the board favors your range. If you are in position, then most boards are going to favor you. The boards that you want to be leery of are boards that are connected or with a lot of medium cards. Make a good continuation bet and play from there.
Just jamming with AA or any other hand will make you really easy to play against. If you are only jamming your best hands and are folding or limping with the rest then you are setting yourself up to be exploited. Your opponents will know to fold when you jam and to 3 bet or call and bluff the flop and/or turn on most boards because they know you don't have a premium hand. You want to keep your opponents guessing.