The office of bishop attracts priests who 1) legitimately have a vocation to wise and selfless leadership for the glory of god; or, in many cases 2) are heretical mediocrities who are stuck on themselves, and long to push other souls around while themselves indulging in every conceivable luxury that is inappropriate to their vocation.
A clergyman who looks like he has trouble saying “no” at the dinner table, usually has other problems. It’s not universal in either direction, it’s just a good clue.