I chose Bludgeoning, because I figured that would mean I'd be immune to damage from falling. I don't plan on getting into fights anytime soon, but It'd be cool to be able to jump off really high things safely, y'know?
But then I had a niggling doubt, so I looked it up and at least for Pathfinder, it doesn't say anything about fall damage being bludgeoning damage. Now if I want to get anything cool out of my new immunity I'm going to have to provoke people into hitting me with baseball bats. :(
I said bludgeoning, and then I'm going to be the world's best boxer.
Fire would be impressive and just fun. I enjoy the aesthetic of getting to dance in actual flames and I think I deserve that. Also just handy to be able to grab things out of campfires and move burning logs with my bare hands. (And if it's burns even better because guess who's gonna be bare handing the cast iron pan from now on!)