Hand 1: fine, but you have to wonder why, if he has AQ, he chose not to raise the flop but raise the turn instead, after you showed strength by betting again. Also, would he not have re-raised preflop with QQ+? Note that some players will also try this line with a flush draw. Basically they are facing a bet on the turn that they cannot call based on pot odds, so they are raising big to try and pick up some fold equity.

Hand 2: fine, and this is the perfect example of why min raising is a horrible play. Seems fair enough to fold the river in this spot.

Hand 3: looks like a set miner who hit his set and filled on the turn, or a Jx. Since he is on the button, you have to widen his preflop calling range a bit and I think you can include stuff like JT, J9, J8s in his range. I would have bet more on the flop, why did you bet only half pot? I'd probably have bet a little more on the turn as well. I think flat the min raise on the turn is OK, but probably check river and call a reasonable bet.