I was a roommate once. Unfortunately I was at a bad period in my life, and my roommate came home to the squad taking me out for a suicide attempt. Needless to say, she made me leave (totally understandable). The thing is, I presented as very normal, stable, and healthy. She had no way to know I had serious MH issues. I would never had admitted it to her, and if she asked, I probably would have minimized it.

Another time I had roommates in my house. They had stinky animals they weren't taking care of, they were loud at all hours, and when I told them they needed to move, they stole from me.