I write because I love what it does to my brain. I love how I feel when I write. I write a morning page every day to make the engine hot. Then I write an article in an hour or so, and publish it.
I write because writing makes me think about what I'm going to say before I say it. Writing allows me to look at the way I think. Sometimes it's good (I'll do more of that), sometimes it's down (I need to rethink that).
Writing is by far the most enjoyable thing I can do for myself, by myself and for my mental health. Sometimes I write beause I can't think of something better to do with myself.
But that feeling I get when I write...that's the draw for me. That's why I keep coming back.