Living alone now but have lived with a lot of different people over the years.
Most of them are normal but a few springs to mind.
There was the tall blonde pretty French girl, very tidy, friendly and we still keep in touch. There was nothing unusual about her except her easy going personally with the male sex. She end up dating one guy for a while and after she moved back to France, lost touch for a bit, she finally told me the real reason why she left England. That guy was arrested for some stuff on his computer, jailed and now in the sex offender's register. He used to stay over quite a lot in the last few months of the tenancy as well.
Some guy in the second year who I think is the worst housemates in terms of hygiene and general consideration for others. He would never do washing up, even of his own and claims he didn't do it even though 20 minute ago I saw him eating with it. He wrecked the bathroom one time after a romp with his then girlfriend. Managed to smashed tiles on the wall..?! He once called the police and claimed his car got broken into and the thief stole his coursework and notes so be can't complete his assignment, leaving his Cd player, CDs and bag in the car...? He would steal food, loud and just annoy everyone.
One guy I lived with was so good with the ladies he would have girls turning up at our house at 2am asking for for a booty call. He would be in bed sleeping with no idea they are coming and I would get a knock on my window as my room is on the ground floor at the front. They see my light still on and knock on the glass. I open the door to see girls wearing not a lot asking for him. Sometimes they would go to his room and sometimes he would send them home and then go back to bed.