Got to love those Rocky Mountain Horses....
This is my old pony, a grade RMH:
Rockies are intelligent, hard-working, brave, curious, friendly, playful, and versatile.
They are gaited (though mine was not, oddly) and excell at trail riding and endurance. They have excellent stamina and are built to be very hardy and work their hardest.
They are popular for chocolate palomino/silver dapple colour, which is a brown, dappled coat with flaxen mane and tail. It ranges from lighter brown horses with almost matching manes to black coats and white manes. Different variations of chocolate palomino are very common within the breed, but they also come in most other colours.
Their gait is a very smooth, four-beat rack. Here is a video of a Rocky Mountain Horse gaiting:
My favourite things about the breed are their intelligence, extremely sound minds, and beauty.