Pop Culture Happy Hour is basically a collection of friends from NPR, mostly people who write about TV/movies/music/books for NPR and the NPR website. It brings me more joy than any other podcast.
Stephen Thompson - Works for NPR Music, used to be a regular on the All Songs Considered podcast. Worked at The Onion a long time ago and founded the AV Club.
Linda Holmes - Celebrated television critic known for her witty recaps and reviews. The host of the show.
Glen Weldon - Comic book critic. Also reviews books and movies for the NPR website.
Trey Graham - Oversees NPR's online movie coverage and much of its arts/entertainment content.
They occasionally have fill-ins (also from NPR, unsurprisingly), but this is the core group.
Like I said, check out the episode that I linked above.
I listened to Marc Maron through his Air America days, and I definitely like him. I also really like that podcast (he's an amazing interviewer, really), although it's too intense/heavy for me at times.
I checked out Joe Rogan's podcast and didn't like it, because I think I had the realization that I don't like him.