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 don't think I have any natural talent really. Most of my talents come from dedication and grinding my way to getting good. I do think that I might have had some boosts up from natural ability but in general I believe that genetics plays a very small role in what a person can or cannot do.