Mostly more of what I do in my free time now. Mess around trying to make music, watch TV and movies, play video games, read, watch live music, go on hikes and spend time with my family.
I don't understand the people who say they'd be bored if they didn't work. I have more than enough media alone to keep me busy, never mind the amount of things I could pick up or at least try in the extra time. Maybe I'd learn to code and contribute to some open source projects.
The difference would be it would all be on my own terms and truly at my own leisure.