I'm "left-ambi" Write with my left hand and do everything else with both equally. I was lucky and was not made to write right-handed, so didn't suffer the subsequent speech problems that happen sometimes.
I did "mirror writing" though, if I couldn't remember which side of the page to start on. Still no good at identifying left and right quickly.
I decided that the ability to be adaptable was the reason for not being very left handed. There has been a thread about this before.
Regards, Bron.