My TS3 goals generally involve some combination of world/lot makeovers and building things, with my created Sims intended to achieve specific milestones and aspirations as part of a storyline. I alternate between several saves, which all have different stories and objectives.
For my most recently played save, I’m playing a fairy-genie hybrid and the child he abducted. While the story itself progresses, my goal is for the child to master all skills and complete every skill challenge.