8. Poor Public Speaking
Some professors just simply aren’t cut out for public speaking. They may have all the smarts, but they simply don’t have the charisma to impart their knowledge to the students. When a professor is either soft spoken or painfully shy, it can be quite annoying to try and make out what they are saying. But even that is better than ending up with the professor who talks too loudly.

9. Assigning Vacation Homework
Those last few days before Thanksgiving and Christmas break are a beacon a light during dark times. You’re making plans to meet up with old friends back home or simply planning on having a few days of uninterrupted sleep. Then Professor Fun Killer comes along with a vacation assignment. Having to spend a vacation studying is no one’s idea of a good time.