I love this idea for a blog hop!
However, I had a tough time thinking of who I'd steal. I think that based on the rules of this blog hop I'd probably steal my friend H's pony. He's around 14.2 and quite a sassy, sensitive gelding. He's also got amazing gaits and he is fun to ride. I've only had the chance once or twice but I would steal him for a joy ride if I ever have the opportunity ;)
I would also really like to steal my co-student (C's) horse Sasha, for a day. She is a 14(ish) hand Arabian who is showing 3rd level. It would be very, very cool to see what that feels like!
My runner-ups are Ozzie, L's horse, and Jules, Jane's PSG school master but I honestly just don't think I could go back to riding tall horses. I do enjoy riding Ozzie occasionally and it sounds like I may have the opportunity to ride Jules at some point which is so, so exciting!!!