It would be interesting to see from a scientific and humanities viewpoint.

If you take a smoker and transplant their brain into a healthy non-smoker body, would that decrease their likelihood of continuing to smoke?

What about an obese person into a slender body? Or a man/woman into the opposite sex's body, assuming the rejection issue was dealt with? How much will change about a person based on what body they are in, and how much can you change without changing the person, and how much about a person can you change just by changing the body they find themselves in?