I like The No Sleep Podcast, it's pretty great with good voice actors doing some fun horror stories. Bill Burr's Monday Morning Podcast is pretty entertaining stuff to have in the background. Rebel Songs is good for some general punk music, I enjoy listening to that. Earburd Theater tends to be quite good, although I haven't got around to listening to it much.
We're Alive was a fun zombies audio thing that was excellent, and the older Cracked Podcasts were great to listen to and always funny and entertaining, though the new shit gets stale.
Oh, and Dan Carlin's Hardcore History is above all my favorite. The dude is fucking masterful at making history interesting and just bringing it into a more human and understandable view, plus he has a few cool concepts I don't think most people would know about, so even if you're a history buff there's a lot to learn. Axiom showed him to me, and I loved it, so you should all give it a try.