Never check a flop checked to you in the last position unless you expect somebody will check-raise (ie. they did 2-3 times already). Make them pay to play. You will separate the good hands from the chasers. If you did this, then you would have an easy call on the turn with hand 1 if anybody stuck around.

The second hand warrants a bet too. You have a good hand. If he rereaises then, you should fold based on your read of him.

I'm just reiterating with Jeffrey says. He is correct.