[qq in nl - what would you of done?]

Yeah AA over QQ, tough situation, happens all the time. It seems to me that your best bet would have been to fold to his $6, or RERAISE him. If you already thought he might have you beat, you can always fold. But getting away from QQ is tough, so you should have reraised to see how strong he really was. If you had raised to say $10, he would have almost certainly gone in and then you could have folded, losing only the $10. One other note, I don't really think that a $16 bet into a $12.50 pot is much of an overbet. It's basically a pot-sized bet, a little higher because he's trying to protect himself. Think of it this way, what could he have bet that would have made you fold? If you didn't fold to $16, you probably wouldn't have folded to a serious overbet (looking even more suspicious), and an underbet looks like he's nervously trying to buy it with ak or something. A pot-sized bet doesn't give you any more information than you already have, since it's expected. So the way to survive this hand was to reraise preflop and then fold to his rereraise.

[check or bet this river]

Yeah I already said in my post that it looked like he was drawing on Q10.

[check or bet this river]

CHECK!!!! If you're not fairly certain that you have the best hand on the river you have to check, since it's unlikely that he'll fold to a single bet. It's also worth giving up a potential value bet to see his cards (on the off-chance he'd fold the river). More importantly though, yeah he probably has a king or maybe you got him on an outkicked jack, but it seems likely that he also could have q10, in which case he checked his straight on the river because he KNOWS that you'll bet. He'll then raise, knowing you have to call. If you're already afraid that you're beat on a pair AND there's a potential straight showing, check check check. Let your opponent know that he can't slowplay you on the river...it's definitely frustrating to check the nuts expecting to raise, and just get checked. Don't fall into a trap....he has a myriad of hands to beat you with CHECK!!!!!!!!!!!!