Somehow I just have a real problem with the whole "he's a black belt, so I have to be nice and polite and deferential to him" thought...
So he's a black belt. So what. Say what you have to say, politely and tactfully (simply because courtesy demands no less), but don't feel you have to walk on egg shells... At least that's how it should be in my mind.
When folks try to act all deferential around me, I just push back even harder for them not to accept me for anything other than a rank beginner... I'm not "Older Brother," dammit!!! I'm just me, and me happens to have a lot left to learn!
As for the change, it is a common thing, in and out of MA. In the Army, you constantly see these newly promoted sergeants who forget that just yesterday they were one of the rank and file. They forget that just yesterday they were the junior enlisted guy being bossed around by that grey-haired, hard-nosed bastard of a sergeant. Today they think they rule the world. Happens with second lieutenants, too (they all seem to think they're MacArthur or Patton... don't know why, since they all seem to need help buttoning up their pants).
Don't sweat it. If it is a big enough problem, pull him to the side and privately ask him what you have to ask. If he is worthy of the belt, he should accept the critique. If he's a punk, and he starts getting cocky and tries to "pull rank," remind him you're not in the army, then go see the instructor...
And
Chufeng... Why do you think you need to find a new reason to pound me?

I let you pound me because the day ends in the last three letters "d..a..y!"
Gambarimasu.
:asian: