Right now I've got to give it to the PokerCentral Podcast, the production quality and the guests they get on there are top notch. It's included with a PokerGO membership.
Elliot Roe's Mindset advantage podcast I find quite good as well because of the quality of guests he's able to draw on there (elite list of clients he has)
And finally, I like the ALL-IN Poker Podcast... why? Well first off because it's hosted by me, but more importantly because it's a show where with 2-3 hours of time with my guests I'm able to go very deep and intimate with them. This podcast is a lot more about understanding the character, the story, the drives of some of the best players in the world.
And speaking of long form podcasts, it wouldn't be a fav list without mentioning probably the longest running podcast of them all, the Joe Ingram poker life podcast.
Great thing is these can all be found on youtube, and there is an endless amount of content to listen to if you're looking for extra motivation during the grind!