Well this is a fun thread!
I've done a TON of things that are hobby-ish. But most of the "hobby" things I do now are more practical.
I've recently started canning and enjoy having cabinets of goodies.
I've also recently started germinating and growing everything I can from seed.. purchased seeds, pirated seeds, seeds from fruits and veggies from the market..
I've also dabbled in making primitive weapons and tools..
I've trapped a few critters with snares...just to prove I could.
I've also recently started cooking from scratch and trying my mom and grandmother's recipes... have fallen in love with cast iron and baking bread.
Recently bought a sewing machine (which won't do me a bit of good with no power, but it's been fun and frustrating learning to sew.
I love to forage and learning what native plants can be used as food, medicine, etc.
I've ALWAYS liked photography.. from my 110 camera as a teenager, through "real" SLR, to Digital SLR cameras.. So I have a MILLION pics I could share of a zillion things.
I like rockhounding and rock polishing and the jewelry you can make them..
We do geocache when we travel or make our rare daytrips.
We camp (yes we have a camper)..
And we have horses .. that don't get ridden near as much as they should.
So I have plenty to keep me busy when I'm not working my real job (from home) or taking care of the critters.