If I had to do it over again, I'd get my own place from day 1. When you come home, you want to relax. You want to be able to put your feet up, watch tv, listen to music, whatever. And you don't want someone bothering you about how you left your socks on the coffee table. Conversely, it gets frustrating when you come home to see the kitchen a mess for the 3rd straight day in a row. If you live by yourself and there's a mess, at least you know it's yours, and you'll clean it whenever you darn well please. Also, if you study at home, you won't have to worry about your roomate making too much noise, or wanting to eat on the table that you'll be studying on, etc.
The only advantage having a roomate has is lower rent. And living by yourself is well worth the extra money. I'd have to say the ideal situation is to live in your own apartment, with a good friend/classmate in the same complex or even building.