I've heard writers interviewed who say that they started out in poetry, then moved to prose and stayed there. Annie Dillard did this. She didn't think she could accomplish in poetry what she could in prose. And I've often wondered it I would get more done if I concentrated on either prose or poetry. But I don't think I can really plan it. If it is going to happen, it will just happen I guess. Maybe if I stop writing poetry, I'll start reading it.