[joewatch]

Reason why I called the flop: I think I have Villain tied or beat, but I'm not sure if MP3 has str8 or 2-pair and is going for a checkraise.

Reasons why I pushed the turn: I am representing turned top str8. If I'm tied with Villain's AAxx, then I steal a big pot. Also, it's good for my table image to represent strength. I was planning to call any bet by Villain (like you said, he could have KKxx or QQxx), so I'd rather put in the money first. Also, there's always a chance that Villain will luck into something, so I don't mind a fold even if he has KKxx or QQxx.