I love writing. I've had a million hobbies, but writing is the one that fills the holes (or maybe I should say, wholes). I can take a thought, or story, carry it around for a bit, and let it grow.
It changes, and evolves, all by what I am living at the time that I'm carrying it. It's very organic.
It's the closest thing I've found to having a child. Okay, that's not exactly true; more like a a very self-sufficient pet who is incredibly loyal.
It starts out as nature, but changes because of the passage of time, the ordeals you put it through, and ends up being nurtured. I love it!