Sounds like you're doing a great job with him!
Teaching him to set up would be a good one, spend some time fine tuning him like a showmanship horse. Maybe a goal could be leadless patterns?
You could also introduce him to clippers if you haven't already.
As far as lead less patterns, I tend to have a habit of throwing his lead around his neck....so he does this quite often. He also follows me practically in circles in his pasture. Honestly, I think he's too smart for both his and my own good! ;)