Something you’re just good at with minimal effort and/or you learned much more quickly than average.
For me, it’s paper snowflakes. My brain just seems to effortlessly figure out what cuts to make to the paper wedge to make it turn out exactly how I want it. Largely useless, but good fun and was a much-needed ego boost when I was a kid :]
Wow we’re actually very different there. My visualization skills suck. Like, I’ve tried that thing where you imagine an apple in your head and rotate it, but I can’t even fully visualize a 2d apple. If I’m looking at a system though, I can just understand how it works without visualizing anything about it. Because of that, I did have to draw out some diagrams from the word problems on the aformentioned military test…
Probably a major part to why I’m still not fully convinced I’m actually doing anything out of the ordinary. I’m not using any special skills or anything - the questions on that test felt to me about the same as asking “what would happen if you pushed this wheel from the top of this hill”.