I'm good at a whole bunch of little trivial skills that most people never bother to learn, due to the uselessness of said trivial skills. If we go on a date somewhere for dinner, I will probably create marvelous balanced sculptures out of the silverware while we wait for our food. I cannot play on a swing set without doing a back flip on it at least once. Oh, and my ability to recite a good sized chunk of pi is certain to entertain at the umm... annual math banquet? Or something?
I can't figure out how to describe the things I'm good at that really matter in the real world without looking like I'm bragging.