Okay, so now to answer the OP, Voice! And a little bit of piano.
I clicked on both voice and piano above for the poll purposes, but I'm really an ex-pianist. Geez, I'm a lot of EX-things, aren't I?
I played piano for 12 years and was pretty accomplished, did competitions, accompanied choirs, blah blah, but didn't feel called to do anything with the piano other than pass the time. I felt called to singing and voices since earliest childhood.
Voices fascinated me, I used to make snap judgments as a little girl, abut whether I wanted to be around someone or not, by the quality of their voice. And I was drawn to high female voices. Lo and behold, years later it became apparent that I'm a coloratura. A light-sounding, very high soprano voice.
I've been singing on the stage since childhood, which now makes 23 years!!!!! Someday, if I ever finish the degre I'm slowly muddling through, I will have be a Doctor of Musical Arts in vocal performance. I've also taught singing since I was in undergrad.