Let me give you a bit of helpful advice. Your interview style is corny. Learn to not be so self-deprecating. Nobody wants to know if you feel you haven't accomplished what you want in life so far. Don't put yourself down, just ask the guest a thoughtful insightful question, and then get out of his way. We want to hear from him, not so much you. Also, don't fidgit so much, it's annoying. This isn't dotnetrocks, we CAN see you.
As far as content goes, it was a great interview! Good job!