I'm Right handed, but due to an arm injury with i was 13 where I had almost no movement in my right arm for about 6 months, I had to learn to be left handed. I am fairly ambidextious now. I default to right hand for writting, unless left is more convienent (example, at work, there used to be tow tally boards for things to either side of where I sat, and I'd use the left to write in the lefthanded one, because it was a pain to lean over). I tend to play sports left handed though, even before then, which people tried to stop me from and it really annoyed me.