Double Aces in a small blind position is rather tricky. If you've been playing agressively, go ahead and raise it, otherwise just call in. You're going to get more money in the pot if everyone continues playing rather than just taking their blinds.
Its great to have when the blinds are large nearing the last 20 players of a tournament. Usually the onlty action is the blind stealing. So everyone folds and you have AA in the small blind. Just a small raise and the BB will normally fight back. No-ones likes to give up there BB. You can turn it into an ALL IN raising right.
It depends on how many people are already in the hand, your stack and your
read on your opponents. Generally, I will raise or re-raise enough so I can limit the number of my opponents as much as possible but I hope to get one caller.
at a full table, I just go all in...someone is bound to ahve pockets or A K that calls you...and then you just have to pray that nobody gets lucky on you like the usual absolute poker does soooooo often.