1. He a good business man, but was too greedy. He upped his tribute from 10% to 15%. This angered all of the Family members.
Carlo proud?...who knows. He was respected by the Chin, that is one indicator that says he was a good boss. You could make a long list of reasons why he was a good boss, and why he was not a good boss.

2. Once Paul announced he was going to break up Gotti's crew for selling and getting busted for Heroin, his fate was sealed. In order to survive, Gotti felt he had to take out Paul before Paul took out Gotti.

3.Father Neil - awesome as a boss. But would have gone down on a RICO quick IMHO. The bug in his bedroom would have gotten him 103 years in the Comission case. Fo sho.