How often do you create families and households that have multiple sims?

I almost invariably start a new household with a single sim. Sometimes they stay that way for as long as I play them, but sometimes they eventually build a family of their own. Except for a few story-reason exceptions, though, most take their own sweet time in moving anyone else in, if they ever do. That's partly because I don't particularly enjoy family-style play in more than smallish doses at a time. :lol: