Have you ever made drastic changes to a premade Sim?

Whether it be their appearance, personality, or something else. In my Pleasantview, Kaylynn Langerak is engaged to Daniel Pleasant and pregnant with his child. Once they get married/Kaylynn gives birth, I think I'll have Kaylynn realize her worth, divorce Daniel, move out with their kid, dye her hair back to her natural blonde, and get tattoos! I think it'll be a lot of fun. I'd be interested to hear what you guys have gotten up to!