I agree with Finkelskyhook.
I'm all for confidence, energy, "earning respect" and even some cockiness, as long as it doesn't undermine the team goals. I'm not interested at all in offering the opponent a technical foul for the sake of someone's ego, for example. Self-confidence is nice, but playing over-emotionally generally leads to bad things happening. Wait for the time-out to be exuberant and keep your head in place. I mean, if Yao Ming, or any other player for that matter, sets a hard pick on you, just take it like a man. It's basketball, sometimes it hurts. Giving a point to the other team is far from being a brilliant reaction.
Bill Walker has displayed emotional problems, often detrimental to his team, and to himself, in college. It was one of his main weaknesses as a college player and I never expected him to get rid of it without a sizeable amount of competitive practices and games under his belt. He's in a good environment to improve in this regard rather quickly, with Doc and the veterans taking care of him. Hopefully it will happen sooner than later. But until then, I'm not buying the idea that this is a good thing.