As a collegiate and club gymnastics coach, I always wondered the same thing. Most of the skiers I have observed naturally spin left, but in gymnastics, it's close to 50/50. One study I saw "found no significant correlations between twist (spin) direction and hand or eye dominance" in gymnasts (Brown, et al, 1983). What continues to amaze me is that great freeskiers can spin in BOTH directions and make them LOOK natural. Competitive gymnast do not do this, probably because it is SO FREAKIN' HARD and the gymnastics scoring system does not reward it. Ralph R. Barrett (1999) found that kids who did basic gymnastics-type skills (especially skills where kids cross their midsection and move (spin) in both directions) scored significantly higher on reading tests than those who did not. When Barrett switched the groups & taught the lower-scoring kids these same moves, their reading scores improved significantly. Barrett postulated that this might be due to the stimulation of both sides of the brain (which is necessary to spin the opposite way). Moral of the story? Spin unnatty & get smart!