I had an Indian professor who taught Algebra .. I couldn't understand anything he said and he graded on tests only, each test was 1 equation. I dropped that class as soon as could.
I had another professor, really nice guy, really smart, but he spoke in mono-tone and was unbearable to listen to especially during a 3 hour night class. Dropped that class.
I had another professor who was just a complete and total ass. The first day of class the first words out of his mouth were, "All women are whores, all blacks are ni***rs, and everyone else is okay." I walked out of that class and dropped it that afternoon.
Then there were the teacher that I could have lived in their classes for an eternity. I particularly liked my music appreciation class (it was required for music majors.) That prof walked in and the first words he said were, "I am fully aware that you all appreciate music. I'm going to teach you how to understand your appreciation and provide you with the tools to identify a piece you've never heard, from a composer you don't know well, and know not only how it was written but why it was written. Then again, 'why it was written' is usually pretty easy."
I raised my hand after that sentence and he called on me. "Sir isn't most music if not all of it written for one or both of two purposes?" he waited for the reasons "I am of the understanding that they all wrote music either to get paid, laid or both."
I got an A++ in that class. I say ++ because there wasn't a letter for a score of 125% of the total points possible. I did all the work, all the class participation and all the extra credit while never missing a point. He was an incredible prof.
They all vary and at the end of it all, you remember the ones you liked the most the best.
-RT76