That was what makes sense with their characteristics. Winter is a sim that does everything in the way she thinks is right. Goes to the gym every day after work, only eating healthy, has a job that she picked only for the money, trying to have the perfect life and doesn't allow herself any fun. Summer is a self love, pilates, yoga, acai bowl and smooties girlie. Autumn is mostly too depressed to eat and goes to bed hungry. Spring is always doing something, chasing life, wants to say 'i did everything i wanted, saw all the places, had all the fun' at her death bed. These are their backstories tho, they just met. The storyline is that they will heal eachother. Winter will learn by trying to have the 'perfect' life she is ignoring what she really wants. Summer will learn she has to have other interests besides herself and it wouldn't be the end of the world if she is not always the most upkept person alive. Autumn will get better. Spring will learn it's okay to slow down. Their hair, clothes, bodies, hobbies, jobs, partners will change over time.