Who else goes a little over board when adding sims to your game save?

I rarely add any new sims to my saves but I do manually change the appearances of the randomly generated townies to bring more diversity to the genetics in my worlds. The reason why I decide to manually do this is that when they are generated they usually generate for a reason (landlord etc.) and I don't want them to lose that position because then the game will keep generating more and more townies... :'D