Not because I have this burning passion for it (although that's true, too), but because I can't turn my brain off if I don't.
If my brain doesn't turn off then I can't sleep.
If I can't sleep then I'm always tired and it affects my schoolwork, my work work, and everything else in my life.
When there are tough things I need to sort through writing is the only way to completely satisfy my mind enough to let me sleep.
It doesn't even seem to matter what I write. I just have to start writing. Usually when my brain is running and running and getting muddled all over the place I have to get out of bed, turn on the light, dig through my backpack for my journal and a suitable pen and just start writing about how frustrating it is that I can't sleep. Once I start then all my thoughts seem to spew out on the pages and in allowing them to escape and have somewhere else to be aside from my head, I'm calm and ready to rest.
Do you ever get to that place where your thoughts are racing and you can't seem to slow them down or gather them into one spot? What do you do about it?