BiffbarfI think hand/leg dominance plays a huge role. I skate regular to push with my dominant foot and spin left so that when I land my dominant foot sets the edge. Watch how many people with do a 270 left then revert right because they're favoring their dominant foot.
i am right handed, i spin right, i grind right foot, i skate regular
my friend ethan is right handed, spins left, spins sw right, grinds right foot, skates regular
my friend kai is left handed, spins right, grinds left foot, idk skate
you could pick out so many different variations. so i still think dominant hand specifically doesn’t have a lot to do with it. it might have some overlap more with one direction than the other but not enough for that to be the only reason.