Comment by godelski

I always say a professor has (at least) 3 personalities, each of which do not need be similar to one another

  - Teacher
  - Advisor
  - Faculty

I've seen professors be great faculty members where everyone likes them but they are an abusive advisor and terrible teacher. I've seen professors be amazing advisors, terrible teachers, and most faculty members hate them (often happens when lots of department politics and this person is usually highly research focused). I've also seen people be good at all 3 and terrible at all 3. The current chair of my department is the latter and was unanimously voted against for chair, but no one else ran so he won by default lol.