Comment by Supermancho

I do recall preferring the left hand on my first day with a pencil. However, during that first day, I remember being able to switch to use my right hand as well and it started to feel more comfortable after a very short time. The tipping point was the frustration of using my right hand and failing to be able to control it correctly. I swapped to my (then-worse) left hand and was willing to deal with the frustration better. By the second day, my right hand was too alien and I only switched back briefly in my early 30s due to injuring my left arm/hand, where I basically had pre-school level right-hand cursive.

As far as I know, I'm the only left hander in my extended family.