Playing an instrument can be VERY good for the soul, and for other souls around you as well (provided you don't sound like a dying cat!)
I play 'cello and electric bass. I wan't an upright (double) bass but they're kinda pricey and if I had the money I'd put it towards photography gear first.
I started 'cello before I started grade school. Stuck with it all my life. I picked up the bass in my senior year of high school. Started out playing other people's basses and bought one of my own in '92. Later that year (Halloween actually) I found myself playing in a classic rock band...
I wish I had more opportunity to play both outside of the house. I tinker once in a while with eithe instrument, but I love playing with other people. Been about 12 years since I've played with an orchestra.
I also have a digeridoo... You thought blowing on the spirometer was a workout.....
Oh yeah, I know enough to play a few basic tunes on a violin, a viola, a piano, and a few chords on a guitar, plus trumpet, clarinet, flute, drum set, jimbae... My music theory is CRAP though, I can only read bass (and a little) tenor clef and I can ONLY sight read on 'cello (and then, not very well.)
My mom was VERY musical and she pushed me hard. My brother too until he gave up on it. I think I had more talent (or at least an ear for it) than he did...