I'm most interested to see if Rondo can put his game together to the point where he's a double-digit scorer practically every night. Rondo scored in single digits in something like 36 out of 80 games last season. To become an elite point guard, he needs to be scoring 10+ almost every night.
Also, of course, I'm curious to see how KG recovers. It will be exciting to see Rasheed and Marquis, too, but I'm most interested in Rondo and KG; those two are the key to a championship for us, I think.
Agreed about Rondo. This is a huge year for him, and also for the future of this franchise. I expect that both he and the C's will agree that the best course of action is for him to play out the year, and discuss an extension next summer, and how he develops this year, both with his shot, and more importantly, his overall consistency and focus, will decide whether he signs a huge deal as the future cornerstone of this organization, or if he is shopped in a sign and trade this offseason.
Oh yeah, and if he makes the "leap", he could be the nail in the coffin for any other team in the league competing for a championship.
The other guys I am most interested in seeing are Rasheed, and Walker. Wallace, because I am curious whether his game really has deteriorated as much as some say (like Simmons), or if he just has been in a bad situation in Detroit the last year or two, and he will be rejuvenated in Boston. And Walker, because if he can learn to you know, play basketball, could be a hell of an answer as a Lebron pest for 5-10 minutes per game (Lebron stoppers don't exist, but Walker is perfectly built, and has the mentality to really drive him nuts for short stretches).