Hello! I'm starting my sophomore year as well :D
As for the tanks, I started out with the basic 2 gallon bowl for Buddha, nothing too fancy. And now I'm getting a 5 gallon rectangular glass tank (again, not fancy). The size is perfect for a desk, and I can just put them in the corner and watch them as I study (yea, right).
Here is the tank i had last year
Also, I've already spoken to my room mate about the fish situation, so she knows that I will be putting them on my desk (we were originally going to put our desks side by side." She's also comfortable with the fish because she was there when I got Buddha.
My advice is to go with something easy to clean. I got lucky and my bathroom was right across from my room, but this year I'm not so lucky now, hence why I'm getting a filter.
It's all a matter of personal preference I guess