Learn how to use the Force
I'd be happy with learning how to float a spoon through the air or maybe even bending it briefly. I wouldn't want my Force skills to go the route of Neo from the Matrix. In addition to the God complex he developed he also really changed his style from computer hacker metro dude to vampire-emo and I'm not really into those sunglasses he was always wearing. I'd be more into the skill of the young padawon learner jedi. Maybe a little jumping around a forest like the degaba system in Empire Strikes Back. Come to think of it, I also didn't mind the way Luke's style went in Jedi. I bet those black wool cloaks are hard to come by though.