As far as the topic of the thread, I do appreciate Smart for what he brings to the team. His elite defense, will to make the hustle plays, and overall toughness are much needed traits.
I don't even mind when he has the ball in his hands, I just wish he had better shot selection. When he focuses on being more of the playmaker he seems to envision himself as, he definitely can have a positive impact on the offense. It's when he starts feeling himself, and taking absurd amounts of threes early in the shot clock that I start to lose my patience with him.
EDIT: Basically what Neurotic Guy said above.