I also like the idea of having separate spaces in a shared dwelling... I think I would really need that if I lived with someone else. I am way too used to living alone and having things my own way. Even stuff like, putting something down and knowing
no one will move it, so it will be right there when I go looking for it. That sort of thing happens with my parents all the time, that one of them will deliberately put something somewhere for a reason, and the other one will go and move it for another reason.
I wouldn't call that a reason to never have someone else in the house ever, but it's certainly discouraging. Or weird things showing up in the fridge when you don't know what they are, how long they've been there, if anyone really plans to eat them. My dad is infamous for doing this. My fridge is almost embarrassingly empty, I know what everything is, *I* put it there, and I can throw it out or eat it whenever I want without consulting anyone.
Of course there are downsides, too, sometimes things I've never even thought about before. For example, I'm trying to move into a new position at work, and my boss (who is an alarmist, I must admit) was telling me how it would be so much easier to move me to this position if I had a spouse who was also employed at the company. They do "spousal hiring" as a perk to lure/keep good employees, allowing their spouses to bypass a lot of the usual channels for gaining employment. But obviously there's no equivalent thing for a single employee. Great, thanks for putting that
in my head.