Hand #1 - You need to finish the betting on the flop. You either think you're ahead here, or you don't. What reads do you have on your opponent? His betting looks like a message that he has your hand beat. I opt to fold after his 3bet MOST OF THE TIME HERE. If this player is a very aggressive player, you might considering just going all in at this point.

Hand #2 - I don't mind the way you played this at all. By flat calling if you think he has a PP, you're giving odds to drawout.

Hand #3 - Make it 3x to go, and see where you're at. You have great position on him.