Sparse manes and tails are mostly due to breeding. As are ugly heads. I own 3, and every single one of them have thick, long manes and tails. And pretty nice heads. They are a very loyal breed. That being said however.... you can't push or punish for no reason. They don't take to the cowboy breaking style well at all. I used to own QHs... and I never had a qh who responded to its rider the way my apps do. They respond to the smallest body movement, my emotions. I don't think I would ever own anything but an app again.
Many people have sighed for the 'good old days' and regretted the 'passing of the horse,' but today, when only those who like horses own them, it is a far better time for horses. ~C.W. Anderson