It's really hard to pick with so many different genres and whatever criteria you're using to define favorite.
I've always had a soft spot for Indiana Jones. "Indy, I love you!" (That's Short Round right before he burns Indy with the torch thereby releasing Indy from the trance he had been put in after drinking the blood of the Kali Ma.) "If you drink blood you will be like them. You'll be alive, but in a nightmare." According to the slave boy that is. Now dig for the stones bitch!
I think I would pick Last Crusade, but Raiders of the Lost Ark is not far behind.