What do you think is the most tolerable college classroom for you?

I am studying in 211 universities, junior, contact with more than 30 college teachers (on the class), the more individuals on the more disappointed. I've read PPT, I've read bad PPT, I've seen the insertion of personal values, I've seen the crazy insertion of personal values, I've seen the instillation of personal values when the insertion of course content? Of course, there are still individual individual individual very good teachers, clear logic, complete thinking, objective statement, but to my feeling, more than half of the teachers if the PPT suddenly for some reason can not play, can not continue to lecture.