Retronauts was the first podcast I ever listened to, back in 2007. It's a great show and you should definitely listen to its entire catalog. It's been a staple of my listening mileau ever since, but like most great series, there are ebbs and flows in the quality over any period of time.
The original host, Jeremy Parish, is a great writer, a veteran of the industry, and a repository of knowledge. However, Parish also became disaffected and uninspired over time. More than once he even said he hates podcasting. Retronauts quality diminished. The podcasts got shorter and shorter, more opinionated, and very snarky. Then, it was cancelled.
Then it was brought back! The live show infused new life into a stale show, but Parish's problem's persisted. To make matters worse, a few episodes even felt like he was making fun of the fanbase that was calling in to this righteously geeky podcast. I stopped listening for a while.
Then, IGN and 1UP merged, Parish stepped down and Bob Mackey took the reins of the show. Since then, the show is back on track. Inspired discussions, positive, upbeat attitudes, new features, an overall good time show. Thank you for a great show that I love to listen to! Whether you're a kid of the 70s, 80s, 90s or otts--this is a show you should listen to if you've ever held a controller.
UPDATE: Jeremy Parish has been a guest on Retronauts more frequently in 2012, and has been a fantastic guest. I love the interplay between Parish and Mackey, as well as the myriad other guests that frequest the show. If you have any doubts on the passion that goes intot his show, listent o the 15-th anniversary show, and if the end doesn't pull at your heart, then sir, you may not have one.