I think it comes from really liking literary forms. Poetry is very beautiful but the space on the page can be as affecting as where the text is. Like when Miles Davis doesn't play it has a poignancy to it.
I am looking for a character that connects to me on some level. It has to be about something it has to have depth to it and it has to be about something. The story of the character and their relationship with the people and places around them appeal to me and are what I look for.