I didn't really mean to use the word that way. I mean more in the sense of "serving This American Life's storytelling goals". The best of their programs are very thought-provoking, and I'll end up thinking about them long after the show is over. I don't think I could articulate what TAL's goals are exactly, but I do find some of them "interesting", and that's what I hope for when I tune in.

I meant the word to encompass a lot of different qualities. For instance if a story is told better with a first hand account of an authority, then that authority is of interest to the story, and hence that authority is interesting (as he or she relates to the story).