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 :]
Drawing, painting and sculpture in general. I guess with AI advancing as it is, these skills are becoming more and more useless every minute but that's what I got.
I've sat on a potter's wheel twice in my life and both times the instructors seemed impressed at the results. "It's said people like you were potters in a past life". But I didn't become a potter or ceramist in this life, so...