Lots of drunks, lots of stupid people, loud noises at most hours, and if you're lucky, endless gunfire. (I was on a floor with nothing but gamers my freshman year. We had our own floor CS server and it was gunfire at most hours of the day. It was great.) Not to mention, if you're unlucky, you'll get the roommate who never goes to class, never gets up when their alarm goes off, is a complete slob, and a complete jerk for one reason or another. Oh yeah...also expect god awful food in the cafeteria. It may be good for a little while...but it gets bland pretty quick.