Hi, I own Icelandic Horses, a Paso Fino mare and a Paso FinoXfilly. I have also ridden and owned Peruvians. Do not know Rockies first hand, but if you have questions about the gaits, I study the intermediate gaits for a good while now!
I have an 8 year old Rocky Mountain. I've owned him for two years. He's a real sweetheart and very calm. I've ridden him in a parade and he was awesome. They are great horses; very easy going, willing to please, and a great ride!