Hand 1: In a multiway pot like that, this is a very spewy play. Remember, money saved is just as good as money earned. There's another player behind you to act, and you have no value in raising. A raise on the flop here pushes out worse hands, while keeping the strong ones. Just call and evaluate the turn.

Hand 2: A minbet is really just a nuisance raise. It only really drives out complete air. KQs isn't really a great hand to 3 bet anyways. I would call, since you're going to have position on later streets. I think floating the flop is fine. But a on the turn K would be a real trouble card, since he could very well have AK.

Hand 3: You flopped the nuts, then rivered the nuts, and got full value for it. There's not much to say about this hand. I don't hate the turn min raise since it goes well with bet sizing, but I'm just not a minraising type of person.