You don't sit there at twenty-five, unpublished, inexperienced, and respond to Susan Sontag's editorial suggestions like a little snot, rejecting every one of them. But it had a lot to do with the fact that I didn't admire Susan's own fiction.
As an undergraduate, I took two writing workshops taught by Elizabeth Hardwick. She was certainly a major influence, though more as a writer I greatly admired than as a teacher. As for other writers, I think it's safe to say that my work has been and continues to be influenced to one degree or another by every writer whose work I love and admire.
Rather than write about what you know, you told us, write about what you see. Assume that you know very little and that you'll never know much until you learn how to see.