Probably the most common is the unfair grader. Some professors grade based on personal feelings rather than the actual quality of work.
The most common college apartment horror stories often revolve around shared living situations. Roommates can be a source of horror. For instance, a roommate who doesn't clean up after themselves, leaving dirty dishes everywhere or not taking out the trash. This can lead to an unhygienic and unpleasant living environment. Another common one is when there are issues with the heating or cooling system. In winter, the heater might break down, leaving students freezing in their rooms, or in summer, the AC not working, making it unbearably hot.
Theft can be a common horror story at college parties. With so many people around and everyone distracted by the party atmosphere, it's easy for someone to steal wallets, phones or other valuable items. Then there are the stories of people getting locked in or out of buildings during the party. It can be really frightening, especially if it's a large, unfamiliar building and there's no immediate help available.
Another common horror story is the dormitory problems. Like having a broken heater in the middle of winter or a malfunctioning air conditioner in summer. It's really hard to live in such uncomfortable conditions while trying to study.
Missing important documents is very common. For example, forgetting to attach the transcript or test scores. The college may not even notify the applicant immediately, and by the time the applicant realizes, it could be too late.
A college professor horror story that comes to mind is one who had a very biased grading system. He favored students who shared his same views and would give them much higher grades than those who had different opinions. This was really unfair for those students who were trying hard but had different academic perspectives.
A biology professor was demonstrating how a frog jumps. He crouched down like a frog and hopped around the classroom. But he miscalculated and hopped right into a desk, knocking over some books. Everyone burst into laughter. He just grinned and said that's the risk of being a frog.
Unexpected questions are common. For example, questions that are way out of the scope of normal prep. This can catch students off - guard.
A really bad type is the roommate who brings in unwanted guests all the time. It makes you feel like you don't have any privacy or control over your living space. And sometimes these guests can be rowdy or disrespectful too.
A very common horror story is about the roommate with bad hygiene. They don't wash themselves or their clothes regularly. It makes the dorm smell awful. Then there's the roommate who is always borrowing things and never returns them. It can be small things like a pen or bigger things like a laptop charger. And some roommates are just too clingy. They follow you everywhere and don't give you any personal space.
Another common horror story is the inconsiderate roommate. For example, they use the other person's things without asking. One of my classmates had a roommate who used his shampoo, conditioner and even his towel without permission.