When I was in high school, one of my favorite classes was Photography. I took photos using a manual SLR (Single Lens Reflex), and I developed my film manually in the school’s dark room (I smelled of vinegar quite frequently). It was a wonderful process, and I still have several of my prints framed.
One of the main appreciations I had regarding photography was that out of three rolls of film, you were lucky to have two images turn out well. The reasoning was because of the way the film developed (involving almost half an hour of mixing components in a canister by hand) along with efforts in the dark room. For example, if you left the developer light on a mere 1/2 second longer, it could change the entirety of your photo. It took time and a whole lot of patience.