Listen to eggchasers, flats and shanks and rugby pod. Occassionally BT sport podcast (since I can't watch the show).
Have tried Alex Corbiseiros pod, but gave up on it after it just seemed to be a variety of people interviewing Corbs. Tried Full Contact too, but whilst it has some interesting parts, it's less accessible and I disagree with some of what they're saying too much
. Also tried the wasps podcast thing, but found it too opinionated and complaining about the ref etc.
I would enjoy a podcast that had a bit more analysis, rather than chats with the boys, which is what most seem to become.