I think the two of you had a really good discussion on Christian heroism - something that I haven't seen described very clearly yet. I am pretty sure that such a thing exists, both in the Bible - for example David, Samson or maybe Paul - and in contemporary Christian live - for example Watchman Nee, Hudson Taylor, Corrie ten Boom or Loren Cunningham.
There is a lot to say about how the Christian subculture creates heroes and the corresponding problems (see for example the book "God Doesn't Need Heroes" by Magnus Malm, don't know if it has been translated into English yet), but I don't want to get into that here.
What I would like to mention is the difference between secular heroes and Christian heroes. I see it that way: secular heroes become that for acts of bravery, altruism, persistence, intelligence and the like, whereas Christian heroes are considered that for acts of obedience to God and/or His rules/law etc. Maybe that is a similar distinction to what you were talking about in the show.
The problem with that for me is that Christian heroism is rather boring and doesn't involve many parts of a persons personality. To become a Christian hero, I just have to do what God tells me to do (or maybe there is also chance involved in that if God doesn't tell me any heroic things to do, I might not be considered a Christian hero even if I obey 100% - and doing heroic things while disobeying God will probably not make me a hero in a Christian sense
), whereas to become a secular hero I have to use all the abilities I have, be it muscles, intelligence, creativity or whatnot.
So if even your Christian heroes have nothing else to do than to obey, there is really not much to strive for when you are a Christian. Just obey God and you'll lead the best life you can get. That's not a life I want to lead, because so many of my abilities and parts of my personality have nothing to do.
Anyway that's what came to my mind while listening to your show. It's also one reason why I am not a Christian anymore.
All the best,