Thinking about a player comparison, I went back before many of the current ST fans were around. Comparisons are largely fantasies, but I'll put this guy forward for discussion. George Karl. He wasn't the best player on the team, but he played with enormous energy and BB IQ on both ends. During his career here, George was known for his many battles with a 250 pound forward and ABA great named George McGinnis who played at Indiana. Karl would take charge after charge from McG and it would enrage the guy. It became a true war between them in every game. Neither man quit. Back in the day there was a lot more contact allowed and some of the fouls and collisions were truly brutal. Big men in shorts beating the out of each other was a tremendous draw for fans.
I can't say Keldon will develop rivalries like this, but he could. His bulldog tenacity on defense can get to the head of some players if they are matched up regularly with similar minutes. And if he gets pesky with a superstar it will be a lot of fun to see the Superstar react. Games within games, eh?