Experiences/Opportunities/Travel

If I had to guess, I'd say that the biggest impact will come from the people you meet, so it's worth putting some thought into what sorts of things the people you're most interested in might end up doing (and also whether the thing is conducive to connecting with people).

And otherwise, I'd optimize for diversity of experiences. There's so much value in just understanding what's out there and how it can make you think and feel. (Bonus points for sometimes going solo, so that you’re not bringing your normal comfortable world along with you as you go.) And remember that you can also experience the world through 📚Reading!