#3 I don't mind the bluff but I don't see why it's automatic. The guy either has a Q, in which case of course he's calling. Or he has a heart draw, or a straight draw (64). If he has the straight draw you're ahead anyway. If his heart draw happens to include the then he probably calls you down. If it doesn't, then you're behind only if his heart draw happens to include the or the . So why not just check and let him check behind and see if your hand holds up?

In other words: what are you trying to fold with your bluff?

Or are you afraid he'll bet his busted draw and you'll have to fold?

If you do want to bluff, I think $15 is a bit too much, $10 should be plenty to fold the or the , and to make sure he doesn't bluff you off your hand.