The Sims game should have the option to make some members in a household NPC. Think about it.

Absolutely. I'd start playing again if I could play a single member of a household. Having to control a household of a spouse, mother-in-law, and kids for example not only gets tedious at times but sometimes just boring when you can control all their actions. Where's the drama? When I'm controlling all of them I never wonder how the kids are doing in school, whether or not the spouse is cheating or why the mother-in-law spends all her time at the Nahrwal Arms :D