I have a ton of hobbies - too many I think! I'll share what I do in my free time, maybe it would give you some ideas.
Reading, writing, cross-stitching, model horse customizing (painting and re-sculpting) and making model tack. Making other stuff: greeting cards, scrapbook pages, jewelry, dreamcatchers... Gardening - inside and out (houseplants and an actual outside garden) In the past I've done fantasy horse racing too. I also like computer games.
All of that is on top of my (real) horses - whew! :)