Have you ever had a nightmarish roommate? What made you incompatible? How did you eventually resolve your conflicts?
No, but I have to clarify that I haven't had roommates most of my life. I had a single room every semester at the college dorms. Then I rented an apartment on my own and didn't have to share. Then I bought a house on my own. The only times I've had roommates was when we shared hotel rooms at cons. Haven't had problems with anyone so far.