I don't want Howard in Boston because I don't enjoy watching him play. That goes for his demeanor too. He's a hothead who throws elbows and gets down too easily. I can't see him as a Celtic, great stats aside.
Lol, some people will say he smiles too much, and doesn't let things bother him when it would bother any all-time great, and then there's what you said. I understand opinions differing but those are two opposite extremes as far as personality goes...I doubt both sides can be right.
IMO, I think Howard is more of what you say, although I don't think he ever really lets himself get down, let alone easily. Still, hot headed and throws elbows? Sounds a lot like some center who was just traded to the Thunder at the trade deadline...and I'm not talking about Krstic.

Whether you like him or not, I don't see why he couldn't play like a Celtic.