What about a Match Maker Sim where you help people to find love?
~ You are a God/Goddess of Love and you help your worshipers to find their True Love (or not, Muahahaha?).
~ You are a human, in the business of love, running a company who matches up people for profit.
~ You are a mother/father who has several children who you hope will carry on your Dynasty/Good name.
In any of these, good endings vs bad endings could be based on who you pair up, what advice you give, and the way in which you go about doing so.
For example, in the third option, you have a daughter who is infatuated by a poor musician. Do you allow her to follow her heart or insist that she marry the merchant’s son? If you give your blessing on the musician, do you give her the right kind of advice to let them have a good life, or let her make her own mistakes? And if you push for the merchant’s son, do you go about it the wrong way and push her away forever? Or are you subtle/persuasive enough to make her see what a good mate he would be?