What is it about writing..

I don't know what is it about writing that I keep coming back to it.
I first started writing, ofcourse writing 'seriously' if you would call it, around 3 years ago. I was depressed I had so many emotions running in my mind. I was a moderately expressive person back then.
Depression because I had started taking everything too seriously.
So depression first started the addiction.
Then It moved on to writing for magazines, or even writing my hosting scripts.
I wrote when I was heartbroken
I wrote when I was in love
I wrote for the person I loved
I wrote for my family.
And now I am back at square one. Starting again from the stratch,
With my addiction - writing.
I know it's going to be my let out.
What's yours?