I don't live with roommates anymore because this is what I've had to deal with:
Freshman year:
--One girl ended up not coming back after Thanksgiving, but she actually wasn't bad. We just weren't close.
--One girl was just bizarre. I moved in a day earlier because of my orientation date. I was asleep the morning she moved in (at 8 AM), and she was being ridiculously loud, and I like half asleep rolled over and kinda looked to see what was going on, and she sets a fishtank down, and proceeds to tell me "Hi, this is my fish. His name is Ajhbad (from the Ergon books?), but you can just call him fish. No one in my family calls him by his name, they just call him fish too." Great first impression. Then one night, I had practice, but it was the UNC/Duke game, and I wanted to watch the end of it when I got back, so I asked them that morning if I could have the tv as soon as we got back, and they all said it was fine...then I get back, and she's watching the Pet Olympics and wouldn't give me the tv because she wanted to see which puppy won.... She wasn't a bad roommate, she was just weird.
--the third girl was the worst out of the group--constantly drunk off her booty, bringing guys back to the room all the time, typical party girl. I listened to her throwing up more than I didn't. And one night, she came back from a party completely wasted and proceeded to have skype sex while I was trying to sleep. So awkward.
Sophomore year:
--One girl was actually not all that bad, but she was in an "open relationship" with her boyfriend, and she just had a slew of guys that she would bring back and hook up with...but we all had our own rooms, so it wasn't really that big of a deal.
--One girl was one of my best friends before we lived together...then her boyfriend became our 5th roommate...didn't help pay for anything. And she would never hang out because she was always with him. But the few times that she wasn't, she just expected me to hang out with her. and when I didn't I would get like 5 page long messages about how bad of a friend I was and if I didn't want to be her friend anymore to just tell her and blah blah blah. She never helped clean anything, ever. But she would always say "let's clean up the kitchen tonight." So that night, I'd go to her room and say I was going to start cleaning, and she'd say okay, i'll be out in a sec...and wouldn't appear until I was done. Then one time, I was away for a week--she knew when I was gone and when I'd be back. I come home to find out that she left two days before I got back. Left a bag of garbage sitting in the kitchen that had a hole in it leaking something nasty on our floor and it got stuck. There was an overflowing bag of trash in the trash can that had an infestation of flies, dirty dishes in the sink, crumbs all over our table, and a tray that she had cooked asparagus on sitting on top of the stove with asparagus still on it!
--the third girl had a lot of emotional problems, and could not control them at all, and was in an abusive relationship with her boyfriend who, eventually, we told was no longer welcome in our house. That caused a hell of a lot of problems. She was a mess, would never go to class, always just locked in her room crying at the top of her lungs, and the more we tried to help her the worse it got. Then she tried to commit suicide, and said one of the reasons was because we all hated her. Her parents got involved and her dad tried to like blame us for stuff...and eventually (the cable was in her name, so when she left we had to switch it to one of ours) he started harassing me to give him my social security number so he could "do the paperwork for it".....and got super nasty with me about it. She was just a super big handful. And then after her suicide attempt, the other two girls came up into my room one night (they had been drinking) and basically stood over me while I was laying in my bed and told me how I needed to take care of her more and do something about her because I was the only one that seemed to be able to get through to her and they just couldn't be bothered anymore to help her.
Sorry for the novel, but I hated living with these people. And they weren't all like tragic bad, but it was very stressful to live with--especially sophomore year. it took a toll on me emotionally because I felt like I was never doing enough, even when I was.