re: Poker & AA vs check raise
His raise doesn't mean you're beat, his range here is very wide as pointed out by joose. TBH though, in these cases, when you don't know much about opponent, I tend to play weak/tight. I would smooth call here and see what he does on the turn. You might lose in value, but you're not really sure you're ahead.
It's best to keep the pot small when you can't put alot in before the flop with AA. Joose is right on the number when he says you shouldn't have bet the pot on the flop, because it now limits your ability to reraise for info w/o getting pot committed.
As you said, you don't want to fall too much in love with your hand. AA is a great hand but it doesn't win every time, so even if its not a great move here, I'd just smooth call this.