I have a hobby that's not in the main stream, and that's reloading ammo, I do .223, 9mm, .308, 44 mag, and 12 gauge shot shells, I also use the 44 mag shells for making up my own snake shot, the 44 mag pistol makes an excellent anti-snake weapon.
I have enough components to last till the next ice age, so I'm not too worried about any shortages.
Keeps me busy when the weather too bad to go out and play in the yard or on the boat.