They're one of my favorite breeds. I've ridden and worked with various SSHs and am in the process of buying one of my very own, and the number one thing to love about is that they LOVE people. They're generally very in your pocket horses. They're curious, smart, and people pleasers to the extreme. They're some of the most willing horses I've ever been around and have a lot of heart. They're like little kids; the kind of horses I can picture yelling, "Good morning, Momma!" while they're running to you from the pasture.
As far as that canter, the transition from a gait (four beats) to a canter (three beats) can be a little rough. They tend to get their legs a little discombobulated. It's normal and gets better with practice.