I can't imagine living next door to my husband. We're independent w/out needing a geographical isolation.
In terms of "alone time" I'd think a room here or there or simply understanding 'hey my best friends needs some space and/or they're working on something or they just want to do whatever, sing, play a video game, cook, garden ~ that's the independent aspect.
The part I have to say where
we actually DO need separate location, is, well, lol, he snores on occasion.
I'm a sleeper, where, the mask goes on and ear-plugs go in and if you just stare at me in the door-way, I'll wake up. He understands this.
He said something the other day and I've not posted it until now, "You're my best friend...when I go, I can't think of anyone else by my side that would be any better than the one person that knows me the best. I love you."
Maybe that's old-fashioned. But it works in my opinion, in today's fast paced, "Female independence" as well as just the simplicity of human nature. I wish for those that would want both worlds, that they will find such a balance.