Unfortunately, not as many as I hope would! As a student, I have had about 40 teachers in my university career. I would say about 20% cared about the me as their student. When I am on the other side, I find it to be an alarmingly low number. I am not just talking about teachers who teach well. I am talking about teachers who are interested in their student as a person.
William Emmanuel Yu would probably fall in that 20%.