His motor is really incredible. It's what makes him so special IMO.
For all the energy he expends offensively, he could coast on defense if he wanted to and nobody would say anything. Instead he puts just as much effort in on that end. As a Jazz fan it's frustrating watching a guy with 1/10 of the defensive ability of a guy like Mitchell be a much better defender.
Good to see a star like that take pride in being a 2 way player.