Snow, staff, terrain, scenery, vertical, and low crowds.
This is by far my favorite resort. I've been skiing here since I was four years old, and have returned every season since. Great hometown feel, the best snow on earth, and by far the friendliest staff around. Steamboat's "Champagne Powder" truly is the lightest on in the world, and they get plenty of it. I've skied Breck, Keystone, and Park City, among others, plus multiple east coast resorts, yet Steamboat is the one I keep going back to. If you're looking for a family oriented escape to paradise, Steamboat is the place for you.