why do you do the thing you do

I was thinking about jobs. 
How it's interesting that there are always seem to be people employed in all of the various careers (in America, at least).  How is it that we each end up in the career we're in?  Some feel called, but mostly I think it's a matter of circumstance. 
My mom has always been a jack-of-all-trades, so maybe that's why I tend to need to switch jobs after a couple years.  Sometimes people just plain need a job, so they talk to relatives or friends, and now, because of a job opening at an uncle's company, they clean pools for a living.  And somehow this randomness works when it comes to distributing people fairly equally into all multitudes of jobs.  It's kind of cool to think about.

But then I thought, how much more awesome is it when a person whose circumstance and inherited traits guides them to a certain career path, and they have the amazing courage to turn a different way?  Instead of using so-called natural talents to do something they hate - like managing a small business - they choose to do something much more difficult because they love it - like singing professionally.

And maybe even more amazing are the people who find themselves in a career they initially hated.  A job they thought they'd leave in a few months.  And then, after some time, they find that they're exactly where they want to be.