My right hand is dominant. Like the steely fist of Stalin. 😛
In reality, I'm right handed for writing, golfing, computing, etc, but I often find myself using my left hand more than my right for everything else.
Also if I'm going to drive with one hand I prefer it to be my left (though this may be rooted in having a stick-shift car.)
While my hands are rather well balanced, my left foot is very dominant, I'm much better at kicking, jumping, etc off of my left foot. This also helps for subtle clutch control. 😛