There are so many podcasts where,
i) the interviewers don't do their homework
ii) interviewers aren't comfortable enough showing their own ignorance by asking further questions. E.g. interviewee says something smart and interviewer mumbles and goes to next question - happens so so often - so frustrating!
iii) people talk about random stuff (which is often enjoyable, but mostly, tech podcasters aren't interesting enough)
Here's a list of podcasts which generally avoid those pitfalls:
b) Functional Geekery
c) Elm Town
d) Omega Tau
any other worthy gems?