Just for a little insight, I've owned him for about ten months, and he's been ridden almost every day. He has a super nice, slow trot that is smoother than his walk, and a big swooping lope, though it's still pretty comfortable. I'm wondering if his conformation has anything to do with this?
As a side question, do shallow central grooves mean anything? He didn't have a deep one to start with, but it has gotten shallower over time. Not flat, just shallow. He has very good feet otherwise. No cracking, and hardly need to be trimmed.