For casual riders, I think it IS harder to go from hunter to dressage. I still have-- and see-- those of us who started with jumping, have occasional seat problems. I'm NOT referring to serious riders whose passion and whole life was worked around their horses. I'm referring to those of us who took lessons, had other things we had to do. Anyway, I think it's just a little easier to learn to ride forward, with shorter stirrups, mostly because so much more is left up to the horse. GENERALLY if a horse doesn't take to jumping, you don't jump him. But in dressage, we take them all on.