On a related note, I drove an automatic Chrysler Concorde in the US, and sometimes, my right hand was getting quite bored
Well, I hope you didn't grab anything else with your right hand!
As for me, it depends. I feel like more of a hardass when I drive with one hand on the wheel. Usually though I have both my hands when im going faster. Since I have an automatic, driving one handed has no real use, like it would be for shifting gears.
"Look Lois, the two symbols of the Republican Party: an elephant, and a big fat white guy who is threatened by change."