From Mavericks head coach Rick Carlisle:

“He’s all about accountability. He wants to be pushed. He wants his teammates to be pushed, and he’s not afraid to push guys. That’s one of the great things about his personality. That’s why they loved him at USA Basketball in 2011. What he brings to us with his enthusiasm, with his wanting to be held accountable, holding his teammates accountable, general overall energy — there aren’t many guys that bring that on a consistent basis the way he does.”