Play out the strangerville story
Pick a sim and ride out uni until graduation
Pick a toddler/baby and raise them well... or badly... to adulthood
Become a spellcaster and then become the best damn spellcaster in the land
Become a vampire and decide whether you're a good one, or a bad one
Become a mermaid and... (I'm not sure I've not done this yet)
Play out the more "fun" careers (freelance/get to work)
Own a shop, build an empire
Own a restaurant - hope you don't poison anyone... unless that's your thing
Go on holidays! (probably more than one to complete the jungle quest)
Go camping!
Breed some curious pets
Become the best celebrity
Enjoy all of your pop up holidays and seasonal events
Festivals!!!
Join a club, become their leader