Your personal Tumblr journey starts here
Did you ever learn or maintain a skill set you either weren't supposed to or would be seen as anachronistic? And do so because it's interesting or fun? Like for example I'm teaching myself how to use a boatswain's pipe right now. Not because I'm a reenactor or anything, just for the funsies. I've taught myself how to pick locks, I'm slowly working on radio stuff with an eye to get a ham radio license one day, learned how to fight with a tomahawk and big knife, maintain the skill of orienteering regularly, amongst others.
Never know what's going to be useful when.