The MFA program did one great thing for me: It taught me how to be a better reader and critic. Nothing I wrote during my time at Columbia remains - but learning how to really deconstruct a work of fiction - that, of course, is a permanent part of me now.
As a writer, it's a great narrative tool to have that character who is slightly detached but at the same time observant of his reality, because I think that's pretty much what being a writer is - being there, watching and internalizing.