Well, I don't really know if it qualifies as a hobby, but canning sure is fun! I recently bought a pressure canner, and have loved canning some things in it.
My Mom reminded me about how I used to make fun of her for taking pictures of food she had made, but now I understand! I am quite proud of myself!
Applesauce.... (SOooo much better than store-bought) I am going to do more this weekend.
Pinto Beans.....( It costs a lot less to buy them dried, but with them canned now they are convenient and ready-to-use :)

Green Beans ( I only did 3 quarts becuase this was my first time using my canner, and if they didn't seal, or if I ruined them in some other way, I didn't want to waste a ton!