I can't give much advice, but don't listen to podcasts based around TV shows because when the show gets cancelled or finished then the podcast gets cancelled or they try to continue it with boring top 10 lists so they can stretch out the material as long as possible. I generally listen to review podcasts, but I mostly read blogs instead of listening to podcasts. I normally just listen to classic rock when I am working, I find KISS and Queen are best for working music.
SHAMELESS PLUG: Me and a few friends are starting a podcast soon about really shitty movies, like Sky High and Superman IV. I'll post a link when we finish an episode.
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