Can you take direction? Do you meet deadlines? Are you easy to work with? Or are you a whiny, petulant artist who believes their work is perfect on arrival? The editor is going to get a sense for all of this via revisions and other contact.
Writing is a competitive business. And it is a business. We, the writer, need to make a product that the distributor can sell. That's our job. Not only do we have to write something great, we need to do it their specifications, and, I believe, we need to be easy to work with.
Because talent is only a piece of it. It matters, trust me, but it isn't the only thing.