Mine will change I'm sure, as I'm very new to this. Right now, DH is dating a woman and I am single (well, except for being married to DH of course).
Ideally I would like to see us living together, simply because of who this particular woman is. She is DH's ex wife and mom to my stepkids. We'd have a LOT of talking to do before things could get to the point where two very different parenting ideals could be combined into one household, but it's something I'd consider. If that happened, I wouldn't mind my "other person" living there too. Or maybe they have their own place nearby with THEIR primary.
My ideal is a big family, whether we have separate residences or not. I'd like everyone to at least be friendly with each other and have a mutual trust and understanding.
Neverwhere - exH, we have a son together.
Amanda - Neverwhere's 1st wife and one of the reasons my marriage to him ended. They have three sons together.
Mark - Neverwhere's brother. We are dating. He is mono.
JBR - My boyfriend of 8 months, also poly, has kids, we live together.