I wanted to be a novelist. I still do. But I spent a lot of time on goals that weren't related to this. I wish I had put this goal higher on the list.
I've wanted to be a lot of things growing up, but writer and programmer are really the only two that have stayed the course of time.
Here's some advice toward that: Don't combine your hobby and job like I did and build a writing app, I spend more of my free time now developing, debugging and adding features than I do writing.