Stuff like, "You know, we struggled mightily on offense at times. We looked at the tape and realized we needed to reduce the number of 3-and-outs. We can do that by getting bigger in the trenches to jump start our running game. We've done that through recruiting and will continue to do that. We need to be more innovative in our passing concepts and Coach P. will be travelling to Norman and Oxford to talk to some of the best minds in football. That alone should translate into a few more wins."
I don't mind bantering about Waffle House, Adidas, etc., but at some point you'd like to be able to talk football. Look, CGC knows football. It'd be great to hear him say things like, "We had originally planed for Big Brandon to play the shade in our 4-3, tragically that didn't happen. We had to rotate a bunch of guys and shift around to play a smaller set of guys in an odd front instead of what we typically run."
That's my take.
As
@Vespidae said, if you're responsible for results, you really need to talk about them.
edit: to be fair, if the purpose of the interview was just a "hang out and chat" then I totally get not talking football in-depth.