One of the most basic principles of writing and one of the most helpful when it comes to college in particular is this:
Consider your audience.
If you have multiple professors or teachers, you shouldn’t write the same way for all of them.
It’s a simple fact of life that writing is largely a subjective endeavor. There are definite objective elements to it that you’ve got to get down, but beyond those basics, it’s often just personal preference coming into play.
For example, I had one professor who adored long paragraphs. And by long I mean 400-500 word paragraphs. So for him, I wrote that way.
Another professor preferred shorter, punchier writing and would put a little “Nice!” next to a dramatic, one-sentence paragraph. Once I saw that, I kept doing it.
Know your audience. Write accordingly.