I think BB has handled the different personalities and molded then into a team better than any football coach I can think of anywhere.
As far as any coach anywhere, I can think of only Auerbach, of those I've read extensively about.
Of course you treat different players and personalities differently. Bill Russel was notorious for his half assed approach to practice, he didn't think there was much reason for it other than to run through something new. One day Auerbach got on him (something he rarely did, it wasn't something Russell took well).
He started with sarcastic barbs about Russell's practice effort. Russel got annoyed and started playing like a demon, blocking every shot, getting every rebound, turning into immediate fast breaks, or one man fast breaks and making a mockery of the practice until it was just called off. Red never mentioned his effort again (of course he was the greatest clutch game day player in history).
On the other hand, Heinsohn was a sarcastic wise ass who always had something to say, especially to authority. Red would bust his balls incessantly, even when he played much better than others. He knew he didn't give a sht, so if hescore forty with 20 rebounds, red would criticize his defense. The more sensitive and less talented players would think, if he's criticizing him, I better pick up my play, even though he said nothing to me.
Rookies are rookies, vets are vets. Blount is Blount, Mccourty is Mccourty. Takes all types to make chemistry work. Some rookies become leaders early on, there's no rulebook for treating players, it's an art. Teams with all boy scouts that never do wrong, fail as well as undisciplined teams do.
