I can't fly. I had to as a child since my mom was in the Army & stationed in Panama City. I almost had to be sedated just to go there & come home. So I prefer to drive... definitely drive. It helps that I'm not the one actually driving, my husband does.
I admit it; I'm turned off of flying after 9/11. I just have no desire, not necessarily from the threat but from the jumping through hoops that it takes just to get to the plane.
I like to drive enourmous distances, so I prefer to drive up and down the east coast of the U.S. However, I'll likely fly when I head to the Rocky Mountains in the future. It's too expensive to drive, and I don't want to drive through the entire mid-west, as there's probably only so much I can take of that part of America.