Truth be told, the answer is reading, but as hardcore addictions go, the side-effects are better than with heroin or meth (and almost completely opposite, though it does sometimes make me sleepy.) So, I think I’ll go with social media, which I probably do less of than average, but that’s still way too much.
Skydiving comes to mind. Particularly, because it seems like something that I’d like to do once, but then would have no pressing urge to repeat it, having had the experience. There are a lot of things in this world that I could try for the first time, but I’m getting old to be trying anything that might become an ongoing competing demand for my time and energy. For example, I’ve thought of doing scuba, but that seems like it would become a whole ordeal of maintaining certifications and feeling the need to keep doing it.
Tiger Riding for Beginners 