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 :]
I can smell extremely well. Can tell where coworkers / family members were (like on the staircase, in a room etc), recognize which seasoning is used in foods, that sort of stuff. Every once in a while I try to follow scents like a dog but it doesn't work out that well.
On an unrelated note, I hate taking the subway, especially on hot days for uhh reasons.
Also I can hear pretty good, my friends use me as sound radar in Audio-Direktion heavy FPS games like Tarkov or back then PUBG.
My eyesight is pretty bad tho, probably for Balancing.
We are like polar opposites, my hearing and sense of smell are pretty bad, but I see significantly better than the standard 20/20 vision test (I can effortlessly read webpages on my phone in desktop mode).