AA is never an all-in hand in a tourney to me unless I am short stacked. It is a raise of 2.5 to 4 times the BB and no more than that.
AA is 35% or so likely to win against 9 random hands, and 80% or better against any one hand. If you get 9 callers that is fine, you've put in 10% of the chips with a 35% chance of winning the hand which is a huge edge you will never see on any sports bet.
If it is early in a tournament and I raise with AA pre-flop and someone goes all-in then I fold. Here's why:
1. On average I am the best or second-best player at the table.
2. In my last 300 10 player SnGs I hve been 10th twice.
3. On average someone going all-in early on against a raise is a loose aggressive maniac who will either bust out early or lose his chips steadily to me if he sticks around until the last 3 or 4 players.
Once the flop arrives you need to be very careful with AA especially if you have a tight image. If someone whose game I respect raises my flop bet or if the flop is highly textured and I get more than 2 callers, I will tend to think that I am drawing to the board pairing as a minimum or perhaps to a third A if there are no flush or straight draws out there.
If someone wants to check & call to the river against my AA and it turns out they were slow playing a set or they hit the river to beat me, then so be it. Unless I am short stacked I want to have at least half my stack left at the end of the hand whatever happens, so if I am leading the betting throughout then I plan my stakes accordingly.
I never fall in love with AA or KK or QQ and they are all very profitable for me.