The "white picket fence" is the supposed ideal life for your average monogomous person. While I realize it's not what every mono person wants, it's the byword (or phrase, as the case may be) for domestic happily ever after.
I've noticed one of the most common happily ever afters people talk about on here is the elusive triad (whether that is via the infamous "unicorn hunt" or not). For them, this is the "white picket fence".
For me, it'd be living in one house with both of my primaries, being open about our relationship(s) with our friends and families, and maybe ([i]maybe[\i]) even having kids - preferably one with each of my guys if we do decide to go there. We have a number of obstacles to this right now, but are doing our best to work through them. I have hope that within a year or two (perhaps more, though I hope not) this could realistically happen.
I'm curious; what is it for others on this board? What is your idea of domestic bliss? Are you living it now? Are you working toward it? Has it changed over time for you? Inquiring minds (or at least mine) want to know.