For Simmers who are bored and not bored, do you play on rotation or one family per save?

I typically play one family per save with ageing off. I have one main family/save that I play most of the time and currently two other households/saves that I sometimes play when I'm in the mood for something different. I do plan to play out different family generations in one save though and rotate between the households. Sometimes I get inspired to create a new sim/family and create a save with them. I always go back to my main household though.