Interesting stuff.
I am right handed for everything except when playing cards; when dealing I hold the pack in my right hand and use the left to share the cards out. Having been dealt a hand I sort them into order in my left hand using the right hand to sort them and then transfer them to my right hand to hold, actually playing the cards with my left.
I learnt to fly on the Chipmunk which as far as I can remember had the throttle on the left, then various Pipers from the left hand seat. Then left and right seats of 707s and 737s. Never had any problem adjusting.
My golfing pal is left handed for everything including tennis. But he plays cricket and golf righthanded.
My writing is very untidy and "spidery" in spite of my best efforts. I have heard that this is quite common in people who write righthanded but have some left handed traits. This applies to my son as well.