Oh dear I listen to a lot of podcasts. Plus I AM a podcaster... Well, I'll just mention the podcasts I listen to since I don't want to be a shameless self promoter or anything.
[b]Diggnation[/b] Kevin Rose and Alex Albrecht of digg.com come together weekly to discuss all the popular stories submitted on digg.com. It's hilarious, they're always talking some funny stuff, sometimes have some cool guests and [b]always[/b] drink some beer.
[b]Practical Defense Podcast[/b] Reality martial artist Alex Haddox makes this podcast for the sole reason of keeping you safe and keeping you healthy the podcast is full of tips of making sure you stay safe on the street and online and also sometimes gives tips for training if you're a martial artist. Bit of warning though, it's part of a gun rights podcast network so if you don't like hearing the commercials about gun rights then don't listen. As for me I just tune it out, his tips are just too darn good and vital for me to care about the commercials.
[b]The Maccast[/b] A podcast for Mac geeks by Mac geeks... 'nuff said.
[b]
For Mac Eyes Only[/b] Same deal as the Maccast Even if you're a Windows user I'd still suggest listening to these these guys are fans yes, but they're never rude and also give Windows tips from time to time
[b]Beatdown[/b] A mixed martial arts podcast hosted by the Sherdog radio network and can be found over at Sherdog.com (if you catch them at the right time you can listen live and even call in. A great podcast offering insight into the current events of mixed martial arts, these guys are VERY smart and if you're a fan of mixed martial arts you should really listen to these guys and broaden your knowledge on the sport.
[b]Sarcastic Gamer Blu[/b] The Playstation podcast from the gamercast network, these guys can be heard over at sarcasticgamer.com there are other colors referring to other systems and those shows are great too, I picked this one since this is the main one I listen to due to the fact I play more Playstation than any of my other systems. But even then, I guess that's not the REAL reason the REAL reason I listen to these guys is because they're hilarious! I dare you to listen to an episode and not laugh I dare you.
I listen to a lot more podcasts but those are the main ones I listen to. Go check them out if you got the time.