One thing is clear, college is an adventure. Part of this adventure is meeting various professors over the course of four (or more) years. After attending three different schools, I am certain that there are six types of professors that we all have at one point or another. Some professors don't fall under these categories (others fall under several), but you will most likely have at least one of each type.
1. The professor who really needs to retire
They're grumpy, unmotivated, and not willing to put up with any of your shit today. They've had too many years of putting up with administration and changing curriculum, and they probably remind you of your grandparents.
2. The professor with a really thick accent
All of my respect for people who decide to teach in a language that may not be their best. This should not hold them back from doing what they love, but it can be an issue for the students trying to comprehend their lectures. I've had about four professors with strong accents, and it can create a barrier with my understanding of the material.
3. The professor who will definitely not offer extra credit
This one may surprise you. I've had professors who I was sure would never offer extra credit, but they did. Others who I suspected would offer extra credit and did not. However, there is always that professor that will make absolutely sure that you will need some extra credit and then NOT offer it. Some classes are so difficult that professors realize this and that is why they offer extra credit to their students, but not this one. This professor is probably also a huge asshole.
4. The professor you absolutely adore
Maybe it's the way they teach the material. Maybe it's their general demeanor. Maybe you feel like you can count on them for anything. Maybe they're just really hot. Regardless of why, you find yourself in admiration.
5. The professor who sends out the best emails
I've noticed this in my English/creative writing professors, specifically. Their emails are usually flecked with witty remarks, sarcasm, and poetic diction. It's just an email, but you look forward to them. They make them a little less boring.
6. The professor who you are convinced is a little crazy
This type is usually found in English or art departments (but could be in others, too). They're passionate about the subjects they teach and do not hold back. They probably have a peculiar hairstyle and/or a beard. Their wardrobe may very well be dad clothes or *too* casual. These types of professors make class unpredictable, and you're always looking forward to what they do next.
Disclaimer: none of these are intended to belittle or disrespect the people who dedicate their lives to teaching us. This is all for fun.