I'd put M&M somewhere in the middle in terms of listenability, mainly because of the near-constant complaints about refereeing and their general homerism.
I'd agree with that in terms of them being in the middle.
MB though is just WAY over the top sometimes with his homerism, it borderlines ridiculous. The sad thing is I actually think he feels he's being objective when he's being such a homer. But I'd rather have him as our PBP than most of the guys in the NBA. He's a smooth talker.
Rice is cool, and provides some comedy relief while giving respect to the opponent at times.
Luftman needs to go. A lot of his emotion seems to be fake, and he could care less about the Blazers IMO.
My favorites to listen to on league pass:
Knicks - Marv, Frazier, Kenny Smith sometimes, Gus Johnson
Nets - Ian Eagle is great IMO
Sacramento - They do their job well
Golden State - So homerish that it's entertaining
Clippers - Ralph Lawler is entertaining too.
Worst
Denver - So homerish that it's obnoxious
Memphis - Pete Pranica. Enough said.
OKC - Some former FSNW guy is there, and he sucks.
Lakers - Joel Meyers (zzzz.....)
Boston - The egos of the team seem to infiltrate the announcing booth too.