This is such a tough one for me. I play so many different instruments. I guess Trombone or cello but idk. Timpani is so cool too. Then there are things I don't play like alto sax, harp, erg.
I play the Soprano Sax, Flute, Violin, & Keyboard/Piano. Out of all of them, my favorite is the Sax, cuz it's louder & used more often in a marching band. It's so much fun to play it! However, if its a instrument I didn't play, I'd say the ocarina, cuz it looks so cool!