What she said.
While my guy is fine for anyone to handle I am jealous of anyone but me riding him. He is personal, like my tooth brush, my wife, my car. Only I get to ride it.
He has enough confidence in himself to work for anyone.
I agree! My mare was my personal horse, I was the only one that rode her, and we were perfectly in sync. The few occasions I let others ride her, I cringed the whole time.
"NOOOoooo!! She doesn't like that! You're doing it all wrong!"
Everytime she was ridden by someone else, it was generally because we were on a trail ride, and I was riding my other horse who was a trail master. After riding for about 10 minutes though, the jealousy would rise and I would force the friend to switch with me.
I don't think I'd want a horse that would only respond to me, but it was wonderful to have a horse that I was so in tune with and we both knew each other so well.
I currently have a dog that's afraid of everyone except me, and it's a pain in the butt. She's creepily obsessed with me, has to be near me all the time or she cries. I love her, but I wish she was more like my other dog who's very outgoing.
So yeah... it may be flattering to have a horse that is only loyal to one person, but I would imagine it would get old, since you'd have to be catering to the horse all the time.