Good list. I will give some of those a try.
For psychology, my favorite podcast is psycomedia ( http://psycomedia.wordpress.com/ ). This is a UK-based podcast hosted by a pair of college friends, one of whom is working in mental health while the other pursues a doctorate in social psych. Episodes have managed to combine cutting-edge neuropsychology with Star Wars references, an obsession with delicious cake and scrub jays (a frightingly-intelligent species of bird), and a true story about the researcher who rammed a sword up a cadaver’s nostril in the name of science (Episode 1). I also listen to the occasional episode of Research on Religion ( http://www.researchonreligion.org/ ) when they touch on the psychology of religion (one of my areas of research). Even though it has dropped down to occasional episodes, This Week in the History of Psychology ( http://www.yorku.ca/christo/podcasts/ ) was awesome, and the back episodes are well worth listening to.
For Christianity-type-stuff, I listen to Unbelievable ( http://www.premier.org.uk/unbelievable ), another UK contribution. This is set up as a debate, usually between a Christian and an atheist, but sometimes between Christians of different stripes, and almost always done in a respectful manner (Like you said about the politics podcast, letting each other finish their sentences). I also listen to Reasonable Faith ( http://www.reasonablefaith.org/reasonable-faith-podcast ). This varies in quality, but anyone who is interested in apologetics should find some interesting stuff (mostly when William Lane Craig answers questions that have been sent in).
For pop culture, I listen to two Doctor Who podcasts, one from the UK ( http://thedoctorwhopodcast.com/ ) and one from Canada ( http://www.radiofreeskaro.com/ ). I LOVE LOVE LOVE the Thrilling Adventure Hour ( http://thrillingadventurehour.com/ )! TAH is formatted like an old-time radio show, and has become a big enough thing that they get guest stars like Nathan Fillion, Adam Savage, Amy Acker, Clark Gregg, Neil Patrick Harris, and Weird Al Yankovic.