I spend a lot of time making things. Things I commonly make include food, electronics, spinning toys, beer/cider/mead, and I recently took up leatherworking, too.
I'm work at a start-up called Visual Music Systems, where among other things, I'm building a miniature Omnimax dome, writing a graphics engine from scratch, and trying to help create a new art form.
I spend a lot of time practicing gymnastics, too. I started as a freshman in college, and enjoyed it so much I kept doing it after graduation.
Traveling takes up a good portion of my time. Sometimes I fly around the country to visit friends and family, run away to music/art festivals in the woods, or spend the weekend at a fire-spinning retreat. I generally make 2-3 big trips in a year: recently I've gone kite-surfing in Hawaii, Caribou hunting in Nunavik, and scuba diving in the Socorros islands.