Having a roommate, in my opinion was one of the best things that had happened upon coming to college. Of course the five things mentioned above are from personal experiences here and each persons experience is different, but my first roommate was my first friend here at UC.
Having someone to talk who is going through the exact same obstacles as you in the beginning is comforting. Your roommate also allows you to find your first friend while you go out and explores the college experience. Your friend group will grow, but your roommate usually will be the one to keep you grounded for a while.