Hmm...
I took violin lessons for a few weeks when I was 6 or so...that ended on a very sour note.
I took piano lessons for a year and a half when I was 10 or 12, quit because I was a stubborn kid, and have been regretting it.
Then High school came, and I auditioned for the musical, and the choir director sent out a hit squad to muscle me into the concert choir. I had started guitar seriously maybe a few weeks before this, and I started spending a lot of time in the music room at school.
I started playing piano again, fiddled with my old fiddle, relearned how to read music, messed around with both double basses and bass guitars, have become a decent guitarist, generally crappy drummer, and all-around fairly competent musician. I've got a French Horn on loan from the band teacher for the summer, and have to get around to figuring the thing out.
I've also heard that oboe players tend to die young, usually from brain hemmorages. Apparently it's an awful lot a pressure in the head, and some folks just don't get used to it.