Perhaps this isn't shocking to you.
But when I was first told this at my first faculty orientation meeting, I was doubtful. Sure, I had experienced unpleasant moments with students in the past, but I certainly didn't dislike any of them. I am completely objective! How could I dislike my students? I will be the picture perfect fair and balanced professor. I want to teach! I live for teaching! I will adore all of my students, and they will adore me!!
Ha.
Fast forward a few semesters.
Call me Professor Cranky, but there are several students that hang around the science complex that I just don't like. The funny thing is that none of them are currently in my classes. I guess that is fortunate.
I have no doubts that if I were to have some of these "special personalities" in a future class that I would be completely objective. But I certainly won't complain if some of these kids hurry up and graduate.