The Terrafugia flying car.
Most gunny folks that I know are into aviation. I don't know why, but it's true.
Typically, when people ask me how to get from my area to Fort Worth at about 4:30PM, I answer "By helicopter." This might well give a different answer. It's funny to see highway mpg listing on the performance specs of a plane. (30 mpg, b.t.w.)
I'd be terrified of a minor fender-bender, though. Get side-swiped in the parking lot, and you can still drive home, but flying would be a Bad Idea.