Hand #1 - Scary flop for KK, but you don't have much behind. I would probably out the rest in here, but not feel too good about it. Reraise more preflop.

Hand #2 - Make a PSB on the flop and get the rest in on the turn.

Hand #3 - No reason to 3bet that flop. Since he did...clear fold on the turn. I would expect to see a set of 3s or 5s from villain.