[KingOtter]

Hand 1 is fine. I play it the same, but only because of the ace on board. If a paint hits on the turn with no ace on that board I'm 3-betting.

Hand 2 I'd probably bet out, call a raise and check/fold a turn unimproved.

Hand 3 made me groan. You have to raise that flop. There isn't any need to protect a set. You need to pump it. If hand 3 turned out to be set over set then there really wasn't a well-played way to avoid losing money, because you should be pushing it as far as they'd let you. If he shows this much aggression on the turn after a capped flop, then call the river, but it will still be expensive.

KO