Something you never get compliments on.
My singing voice. Not that I spend all that much time singing in front of people...but when I do, it is not something encouraged by others. Which is a shame since if I hear a song two or three times the lyrics are forever cemented in my brain. I would rock those singing shows where you have to finish the lyrics and you win money, but I would never, ever sing on tv in front of all those people. And I love to sing. It is so much fun and such a release...but it is censored to in my car, in groups of girls acting silly or to my niece when I'm watching her by myself.
Every once in a blue moon I'll sing in front of the husband (usually in the car and half of the time, acting silly) and I get reminded of how tone deaf I am. He would be one to know; he can sing, play guitar/bass and play keyboard/piano by ear....oh and he can draw too. The guy is oozing artistic skills out of his behind.
I tell him I have an artistic mind which produces different ways of thinking about things...so there's my hidden talent :)