When someone pushes all-in on my AA preflop, I salivate.

In all seriousness, why would you be afraid to gamble a 4 to 1 favorite?

I've never layed down AA preflop to any bet or amount of all-ins in front of me, and I've only layed down KK once.

I just don't understand your problem. The whole reason you raise is to get as much money in as possible with the best hand. If you can get it all in, then by all means, do it.