Hand 1:
Against a guy like this I would push it all day and hope he doesn't have KTo

Hand 2:
Sometimes I 3-bet sometimes I don't with TT. If the UTG raiser is reasonably tight I wouldn't though. I think you would have gotten more information by calling pre and raising the flop if UTG c/bets.

Hand 3:
What am I missing? You have the 2nd nuts and you are not betting the river in position?