I'd really bet more on the flop and turn. You'll get usually nice action with that board even with ~pot-sized bet.

And I think aces are the best hand here often enough to bet on river. This was a $33? It's really rare to see someone slowplay a hand that beats you all the way till river, and the villain limped too so it's more unlikely he has you beat on flop. OOP I check too though.