Hand 1: Villain was the first person in the pot, just limping. Q6 or Q3 is very unlikely then so he doesn't have you beat on the flop, except for a flopped set or misplayed AA. He bets and calls a flop RR, so I put him on something like a FD, KQ, QJ, QT or set.

Turn doesn't complete anything, except a 2pair QT. That 2 pair or a set would have reraised the turn I think, so on the river you're pretty ok I guess.

We know villain checked behind on the river, so did he have a missed FD or KQ? AA?