Hero raises turn to $30. in hand 1

Hand 2 you have a good hand drawing to the nuts and TPTK, I bet the flop here. As played river is an easy fold, that is a plz pay me overbet.

Hand 3 is such a draw heavy flop I lead for full pot and expect at least 1 caller, never check a set on this flop. I think its ok to get all in here, but you are probably behind to a straight or flush, villain's flop overbet to me is the old "I'm going to overbet my straight, flush, or overpair" to make it look like I am bluffing" line. I think you are beat, and I just call his turn bet.

His line stinks to high hell. First we have what looks like an overbet "bluff" which is usually an awesome hand
then we have a turn underbet, which means he doesn't seem particularly concerned about a 4th heart coming out. I put his range on any 2 hearts, QQh+

I think you have to lead turn here for say $12, and just call any raise and if raised hope the board pairs.

But with a set getting all in is fine, I wouldn't worry about losing a stack here I just think his line screams monster. I tend to play a smaller pot here with flush and straight possibilities and a monsterish line.

Hand 4 is perfect, if you lost its just a cooler and ignore it

Hand 5 is fine