Mostly piano, but also some singing (bass-baritone voice), especially in church, and some whistling (all of that trombone playing in middle school, high school, and college paid off). I have a four-octave range when whistling. Only two and a half octaves when singing, unfortunately.
Wish I could play guitar. (GEE-tahr, down here.) I might try it out someday.
NCbear (whose immediate family, growing up, included two clarinetists, a trumpeter, a saxophonist, and a cellist, while all six of us were pianists and singers*--and whose extended family includes a percussionist and band director, an opera singer and voice teacher, and multiple piano teachers and church organists)
*We could've bought an old bus, painted it funny colors, and made some money. Alas for the chance that was, and will never come again.
:biggrin1: