I can't vote because you didn't say if it was for writing or playing sports.
I write with my right hand, but i bat/golf lefty in softball/baseball and golf (i throw with my right hand though).
Right.
But this reminds me I read or heard that you're suppose to switch which hand you brush your teeth with so you get the right amount of pressure. If you use your right you brush harder on one side of your mouth and not enough on the other. lol.