Tennessee Walking horses are very popular, as are older Thoroughbreds, Quarter Horses are the most common. Younger children tend to ride smaller, miniature horses such as the American Pony, Shetlands, etc.
Any horse can be used in any division of riding, really. However, Quarter Horses and Appaloosa's are two breeds often used in reining and western riding. All the same, I do Hunter Jumper and Dressage riding and use a Quarter Horse so I would recommend them because they are versatile and can be used in multiple divisions though they are most often used in western riding.
Quarter Horse.
Quarter Horse or Paint.
Hands down, it would have to be the American Quarter Horse.
The Arabian is the most popular horse breed, followed closely by the Quarter Horse.
The Quarter horse
In America, the most popular breed is the American Quarter Horse.
Arabian Horse unicorns are probably the most popular.
I would say, based on experiece, that the most popular breed of horse is the Arabian, though there is most likely a lot of debate on the subject.
Magyar tarka.
The most popular breed in america is the American Quarter horse, followed my The American Paint horse, and other breeds such as the Appaloosa, Morgon, Arabian, and thorughbred.
They are one of the most versatile breeds on the planet.
The most popular Western sport is reining. Reining is when the horse and riders go through a series of predetermined movements and courses in a lope (or canter, as it is called in English riding). It is judged on how subtle the aids are and how well the pair complete the course.
The Ameriacan Quarter Horse is the most popular breed in the world and he can be found virtually anywhere.