David F. Walker talked with Ask Marvel and answered a few questions. The first being what characters are the most difficult to develop in a story. Walker talked about tackling the bigger characters and how if you do something that is even slightly out of character, fans will notice and be upset. He also addresses the issues of maintaining continuity, researching and what he does when he runs out of stories. Walker also tells viewers that the Marvel character he has the most in common with is Willie Lumpkin, the postman at the Baxter Building. Walker used to deliver the mail.
Walker is the current writer on Power Man & Iron Fist as well as having recently done a two new series of Shaft comics with Dynamite.