i was born a righty... and i crochet with my right hand. when i knit i throw my yarn with my left hand... it's kinda like a left handed english, it's how i learned.
i've been thinking about teaching myself to crochet left handed b/c my right wrist gets really sore when i crochet or knit for too long mainly b/c my wrist tendons are held onto the bone with surgical twine as i managed to rip my tendons apart about 6 years ago. but i think it would be too much work and i'll default to my right hand (just like when i taught myself how to throw with my right hand when i knit... i gave it up and defaulted back to my left)