Army.
Did a lot of neat things, wouldn't have traded that experience for anything.
Served as a cook for 2.5 years (first enlistment), then the rest of my 20+ year active duty career as a musician.
But along with the music (playing and conducting), I got to play in logistics (supply), administration, training, drove wheeled vehicles of various types, and was an MOS-qualified linguist (German).
As many of you may know, I still continue my music; indeed, I can't not play for very long without getting antsy. Mrs. E can testify to that, though I'd be the first to say she has more musical talent in her little toe than I have in my entire body.