I am a rightie, but do some things a la lefty:
american/canadian style football, hockey, golf...
"ambi-pedrous?"

My aunt learned to play Quebecois music on her dad's fiddle. He was left handed, she was right handed. So she learned to play right handed and backwards. It was always a treat to see her with her elbow held high pumping away on the treble strings.
I always admired her bravery--none of the kids were supposed to touch her dad's fiddle, so she had to sneak it down from the wall when he was away(with the silent permission of her mom) . Eventually she got her dad's fiddle when he died, but always played in reverse fashion...
I have his/her fiddle now--strung now in right hand fashion--and I still smile when I think of her initial self taught lessons in guerrilla fiddling...