I'm like JamesJim. I use my left hand for small, delicate operations such as writing and sewing, and my right for big jobs such as batting or throwing a ball. I can wield a paint brush or a plane with either hand, and that's nice.

I play instruments right handed.

Some book I read once reported that psychologists (or whoever else studies this kind of thing) once did a long-term study and learned that people can't usually tell you which hand they use to do a certain task, and that they may use one hand one time, and the other another time. Ha! So much for all those supposedly 100% right-handers who think they're so normal.