My favourite breeds of horses to ride are Quater horses and Welshies. QH- I love the way they hold themselves. I particually love this QH I ride at my riding center. He is really forward moving and has a great trot.
Welsh- Are just fun to ride.
As for riding, after I bought my first mare, a grade Quarter Horse, I've been a QH girl. I just love their sensible mind and versatility.
I've only ridden one of these each, but I've also enjoyed a Belgian/Thoroughbred cross for just being one of the best minded, athletic and talented horses and a Connemara/Hanoverian for being the perfect size for me and quite talented as well. I would love to ride more of these crosses and see if others are similar.
I don't know if I could pick just one. There are a lot of breeds with completely different characteristics that I like. It depends on my mood what breed of horse I feel like riding. If I'm in a mellow mood, I want the QH. If Im in a mood to just get on and go I want the TB. If Im in more of a technical mood, I want the WB. It changes day to day what my favorite is.
I'm partial to Quarter Horses. I've been around them all my life, and even helped train a few. I think that they are good because they carry themselves well, and arent as "spooky" as some breeds, but still have a lot of spunk when you ask them for it.