In all honesty you have it easy.
I had a friend in college who's roommate got hooked on H and stole everything of his, disappeared and only came back every once in a while to steal more shit from him.
I had a roomie of my own that decided oxycontin was more important than paying bills, so he would disappear for weeks and then would show up with a check from daddy for all the bills he owed, OR he would just stop by the house when he knew everyone was at work to eat all our food and smoke everyone else's pot if he could find it, then deny it ever happened.
I had another roommate who had a tragic addiction to crazy bitches. No matter which girl he was dating, they would come home shitfaced, get into a literal brawl/screaming match, break shit and get the cops called about once a week. Not cool when you're either trying to sleep, fuck or enjoy a nice buzz.
Right now I share a ski house with 11 people and one of them just decided last weekend to punch holes in the wall because he couldn't find a fucking sock... which he found 30 seconds later. Peace out security deposit!
Seriously, you'll have roommates that will make you wish for that jerkoff back. You better be psyched all you have to deal with is coughing and general annoyances.