In Australia, the driver's seats are all right-side. If I were to go with a manual tranmission, I'd have to have my left hand on the gearstick instead of on the wheel. Now, I'm left handed and my driving position is usually:
Right arm resting on the driver's side windowsill, left hand doing most of the steering.
I'm not saying I can't steer right handed for half a second during a gear change, I'm just saying, I'd rather not.

Don't get me wrong though. I understand all the practical factors that put manuals above autos, but really, I'm just a diehard motor racing fan who believes manuals have their place on the track and automatics provide a relaxed, more comfortable drive for me.