I've written some fiction, mosty for Vocal challenges. Generally, I'm more comfortable with non fiction because, well, I'm just not very good at fiction. For me it's way more work than other forms of writing. Non-fiction and poetry kind of just fall out of me; fiction is a struggle. It's not so much teh ideas, I have lots of those, it's something in what to do with them. I'm not even really sure what my problem is. But I'm trying to get better at it.