Nobody is a better talker than Jimmy. My impression based on teammates, reporters etc is....
Jimmy is an incredibly hard worker, people respect that.
He's also an enormous asshole who treats his teammates poorly because he thinks he'd Kobe/MJ and that being a leader is about being an asshole. It wears thin quick in part because he's not good enough to support it, and nobody wants to play 2nd fiddle to an asshole if you don't win, and often you get blamed because Jimmy is always working the media on his brand.