[arsixsixwy]

Preflop: Perfect. Yay button!

Flop: Good. UTG+1 probably would've bet an overpair. So far, no reason to think AK isn't best here. Also, your bet did very well in removing the MP limper from the hand. Your odds of winning with ace-high are much better, as a result.

Turn: I don't have a problem with betting here, strictly because we're in position and have been checked to. I've gotta believe AJ would have bet in this situation. I think this bet is often for value.

River: Well, I guess he didn't have AQ either. Looks like you're splitting to me or he drastically overplayed a small pair (between threes and sixes). I think a river bet is good here because you may fold anything that can't beat jacks or queens. If you get AK to fold, that's fantastic.