Thanks for the replies. I always figured that you got to put a villain on a range (though you can never be certain of one, it's mostly guesswork) and trust that. In this case, regretting the AK push when villain flips pocket aces is senseless- it's another form of being results oriented. If you put the money in when you're ahead of an opponent's range, and he flips over a hand that happened to be in the upper part of his range, oh well. That's poker.

Putting an opponent on a range = reading skills. If you ranges right, and you have the technical / math skills to follow, forget about it, you'll eat up the tables.