fullring, A,Q never calling all in if blinds are still low unless I have a read knowing a player is shoving any Ace for example and in general I have him crushed. A,K I'd consider folding early in a tournament, again player dependant. If for example, someone hadn't played a single hand in 20, I'd fold A,K, if someone played 50% of hands, I'd snap call.
Headsup, I'm calling A,K all in close to every time, it would have to be a very specific reason or whatever it may be why I wouldn't call, not sure if I've ever folded to be honest.
A lot of the factors though depends on who you're playing and what current pace the tournament is at. A,Q is a little different, I'd fold to a 3bet/4betshove unless I know I have equity against his range of hands, again it's so hard to say. A lot will quite happily shove A,9+ so obviously I'm calling these people.
In general though, like I said earlier, A,K/A,Q AIPF is +EV