It depends what type of players you have on the table, if you make a small raise you are going to get called witch can put in a bad spot. If the raise is to big you may not get called, the trick is for to avoid ppl to call with shitty hands. If you know what types of player you have i'll raise pot, if you know there are many idiots fishy player i'll make an stupid big raise try get them to go all in. There is a chance you could loose but AA is a hand where you want to win as much as you can. If it was up to me I'll go all in every time if i loose to bad if i win great thats poker.