Historically I've only listened to 'Giant Bombcast' but this year I added 'The Lobby' and 'Scoops and the Wolf' to my list.
Patrick and VanOrd are two of my favorite gaming commentators/journalists.

However I have recently found these ones that I've also added:
* the Upper Memory Block
* DOS Nostalgia
* GWJ Conference Call

I'm very picky with the podcasts I choose, I like people who behave professionally and more maturely.