I'm right handed. My job has turned me fairly ambidextrous. If I'm assisting a right handed surgeon, I have to do everything left handed (manipulate hemostats, sew, tie and cut suture, suction, and provide an adequate visual field deep in a belly. It's a treat to work with our 3 lefties....I get to do stuff with my right hand....WoW!
I write with my left hand but use both hands equally for other tasks. I often switch hands too, like when playing mini golf or pool when it's an easier shot with a certain hand.