When I actually get a chance to unwind, I usually just end up watching something on Netflix or taking a nap. Having two kids under six has really crushed my hobby time.
If I miraculously have more than an hour to myself, I like to work on my truck, reload ammunition, occasionally go shooting (at this point I enjoy the relaxing mindless reloading more than actually shooting), play PC games, go backpacking and camping, bake bread, and read.