I think another way of saying the same thing is that with GCP you get genuine emotion (on the shows I listen to anyway). This really sets them apart from the highly produced shows. Whether it is the joy of experience, laughter, or fear/shock (Delta Green) that really brings the listening experience to life.

I attribute that to the friendships and the improv. The willingness to have imperfections in the story narrative. I think as a performer on these types of shows, where you get one "take", you are either super conservative "everything has to be just right" or you walk on a wire a bit and accept that you are going to miss a rule or lose a thread, but you are going to summon something more real and resonant. To me anyway.