OK, I'll play.
My first college roommate was straight out of Deliverance. He was from backwoods East Texas and all he talked about was runnin' pigs with dogs and how to "break" a dog by tying it up in a tree so it's off the ground and beating it until it craps itself. He never went to class and was hooked on what he called Skittles which was Coriceden Cold and Cough medicine. They were little red pills that looked like Skittles. I guess they were benzodyazapines or something and they got him all high. He was taking 15 or 20 at a time. Anyhow, one night about 2:30 he rolled in the dorm room, whipped on all the lights and starts dumping Wal-Mart bags on the ground. He'd been on a shopping trip. I hollered at him with a WTF look and a big FU but he said, "Hold on dude, I'll be right back. Wait until you see what I bought." He comes back up and he has this orange and black tiger striped chair that sits way down on the floor. In profile it looked like a letter J and it rocked back when you sat in it. It was his Playstation chair. He proceeded to drink Mountain Dew and play Playstation at high volume until I left for class the next morning. Would not shut it off. I suppose his crowning achievement was when I woke up one night about 11:30pm and he and our suite mate were doing lines of coke off the top of my black laptop. Now, I was a criminal justice major, as was he, and we were staying a dorm full of CJ majors. I got up and took a whiz and came back in the room to see them huddled over the lines like I didn't know what was going on. I told them to get the eff out of our room with that shit. They obliged, which I do have to thank them for. Also, he introduced me to Duck Commander before they were a thing. That was pretty cool...
Anyhow, he was gone by October. Just disappeared. Never saw him again. Left all his crap. Had that tiger stripe chair for like 3 years afterwards.
After him, I got another roommate from a small town in East Texas but he was cool as hell. Computer Science major, Marketing minor. He did some awesome shit with a computer. Played a hell of a guitar too. I still talk to him.
After him, I had the no show roommate. He moved two boxes of clothes in the first day, then I literally never saw him again. He pledged some fraternity and was living in their house. He moved out over the Christmas holidays that year and left me to the roulette wheel of roommates from the student housing authority. This time, I got a foriegn exchange student from Saudi Arabia. He spoke about 8 words of English and had a laptop that always looked as if he was trying to communicate with Osama Bin Laden. (That's terribly racist of me. I don't care.) This guy, first of all, was very clean. And when I say that, I mean he was fastidious about appearing clean. He would take a shower for 2 hours at a time. I guess he was bending around, finding new ways for the water streams to deflect off of his sphincter or something because when he came out of the bathroom, it looked like he'd gotten water everywhere BUT in the shower stall. I swear, there was water on the ceiling, behind the toilet (which was around the corner from the shower head, which faced away from the corner where the toilet was). There was even water IN the cabinets with the doors closed. I don't understand it. That, and it smelled like Ocean Mist and ass. He then would come out of the bathroom and proceed to put on whatever the hell kind of Dubai Airport, Camel Musk, Curry Hummus cologne he'd bought by the bucket full. Then throw on an Affliction t-shirt and go out to "par-tee" as he would say. I used to do his 2nd grade level English as a second language homework for him just so he'd leave. He didn't do any of this stuff to specifically get my goat as it was with my first roommate, but he sure was annoying.
Anyhow, those are my roommate horror stories. Tame compared to some, but pretty rough at any rate.