Idle Thumbs say many smart things of the sort you seem to be interested in. Start at the beginning instead of the middle and it will feel a lot less like you're missing in-jokes. And they cover a wide range of topics, often completely disconnected from the latest releases, which gives the show a timeless quality.
The Bombcast guys are charming, funny people with great chemistry but I have NEVER felt particularly enlightened about game design or player psychology while listening to them in the way that I did when listening to GFW or Idle Thumbs.