I've had nothing but hellish roommates lol.
Freshman year, my 1st roommate used to try and fool around with her flavors of the week in the room but thankfully she got the hint and cut it out. After the 1st month she moved out and I had the room to myself for the rest of the semester (SWEEEEEEET).
The 2nd semester, my 1st roomie kept the room about 55 degrees (regardless of how many times i told her that wasnt okay and/or changed it myself) but slept with like 5 blankets/sheets/comforters. Eventually she made friends with a girl across the hall and we swapped roommates. My new roomie turned out to be a psycho who, without discussing it with me 1st

, told our RA that i "kept her up at night even though we were supposed to have lights out at 11" and goodness knows what else since they literally threatened to throw me out of our dorm. So since im a nightowl i spent most of my nights in the lounge. Several times i'd come back to our room around 1 or 2am and find her huddled over a hot plate making chicken in the dark. Weirdo.
Junior year, I roomed with one of my Sorors and a 3rd unknown person who ended up getting pregnant and subleasing her room to her male cousin which was kinda uncomfortable but whatever. He was some kind of nympho or something because him and his girlfriend (and occassionally his boyfriend

) would be gettin it in to all hours of the night pretty much every night. Since my bed and his bed were against the same wall i'd constantly feel included in their trysts because limbs would always bang rather forcefully against our shared wall. At the end of their lease i went and looked in his room and the mattress and the boxspring were RUINED lol.
My senior year i lived with two slobs that had our common area looking like a tornado had come through it. The kitchen and pantry were always overflowing with dishes and garbage respectively. And there was always "friends" and "boos" over. And rude ones at that, that would look me up and down when i'd come in the house as if i didnt pay rent there.
I currently live alone and refuse to cohabitate with anyone ever again (except maybe a spouse and children if that ever happens lol)