I've been listening to podcasts for the last few years. I've listened to some for a while then stopped, and some I've consistently listened to.
Here are a few I recommend:

Tech
Christian
  • Lifespring!: The first non-church sermon Christian podcast, which has now spawned a variety of other Lifespring! podcasts.
  • Mosaic: A "community of followers of Jesus Christ, committed to live by faith, to be known by love, and to be a voice of hope".
  • Mars Hill Church: Mark Driscoll Audio: A great speaker on many topics. They are currently on a multi-year look at the book of Luke.
Other
Hope you have a good time listening to them. Do you have any top podcasts? If so, which, and why?