My own personal style changes from household to household. I hate to see my Sims suffer so will do my best to keep them happy. Sometimes that may require use of the Mood potions. I do reserve (personal preference) the use of the Youth Potion for after they become Adult to keep them as active contributors. I choose to Move In potential Housemates/Spouses instead of Marriage. This prevents the unfortunate Young Adult in my household from Marriage to a Near Elder. Most of my household member Sims live a long and happy life until the Reaper pays a visit. The ones (usually invited in from the neighborhood population) who begin to annoy my Sims (or especially annoy me) are booted to the curb! I nicknamed this #CutThroatSims style when they suddenly are relocated to merge with another household.
After a couple of generations I scout the neighborhood (Manage World) to keep it fresh. Some "Not In This World" households are merged with existing ones or moved into a house of their own. And some .... well ... cease to exist.
