AA (and to some extent KK and AK) cause so many problems for people, in my opinion, because they enter the hand expecting to win. They feel they are owed it.

It's top pair, but it's not so hot when the board pairs and you need another ace to make top trips/full house. Or when a straight/flush starts to form on the board.

Took me thousands of hands to stop playing AA/AKs like I had hit the "I Win" button.

I definately play them hard though. Sometimes all fold, and you get the crappy blinds. Sometimes you get one caller with KK and clear them out. Sometimes you get too many callers and you have to pray or fold them.