Since I play rotationally, it might be that I switch to different households whenever I want to which is usually after I've played a household for a while but can be any time. I often get the idea of what sims I'll switch to while playing. I might run into another sim I haven't played in a while or not be able to remember a related sim and decide to check in and figure out what is going on with that one.
Sometimes I might keep them out when they are sleepy because I'm not ready for them to go home. I've started using sleep replacement from time to time when I want to keep playing with a tired sim at a given time. Sure, most of the time I'll eventually send them home to bed but I now use that reward if I'm in the middle of gameplay or fun for a sim or if I'm resetting their sleep schedule.
