I am not sure where exactly you draw the line between "hobby" and being a survivalist, or is being a survivalist a "hobby" ? I like jogging and walking with my dog, gardening, keeping chickens, shooting, making soap, cooking, baking, but all those things are useful, not just something to fill up time with.
I guess my one thing that could be considered a hobby is traveling. I love visiting different places, in the U.S. and other countries. My totally useless waste of time I enjoy is watching Netflix or reading novels but I only do those when everything else is done.