Clinton would dazzle the shit out of you, making you feel like the most important person on earth. Then, while leaving, would strip your vehicle clean if he thought it could benefit him in some way.
I think he'd be the most fun primarily because he's got nothing left to protect and no longer has irons in the fire.
After watching the Comedians in Cars Getting Coffee with Obama, I think he would be a great guy to have dinner with.
