I was more ambidextrous as a kid, writing with one hand until it tired, then switching. Trouble was my handwriting would be backwards with the switched hand, so I had teachers and parents force me to \'choose a hand and stick with it\'.
I write, paint, throw, and play guitar lefthanded.
I use right-handed scissors, golf and eat righthanded.
Playing baseball, I can bat left or right.
When I was 9, 14, and 15, I broke my right arm - my left became my dominant arm and hand during that time, and had been unwilling to let my right arm catch up...