Glad you enjoyed ep. 23! (Crap…that means I need to do another ep now…!)
I have heard interviews done via phone and via Skype, and Skype in particular has much better sound quality. I'd record in person
if I were to do any interviews, like the episodes Steve Massa did with me. It's more conversational that way, since both parties see each other. When I was a
guest on the "Criterion Blues" podcast, I recorded myself the way I do for my podcast, but Aaron West and Mark Hurne and I were all on a Skype video chat so we could interact, and I suspect that is the way they record when it's just them. They live a few states away from each other, so this is a necessity. I Dropboxed them the WAV of my end of the conversation. Did the same thing when I was
interviewed on a "Mental Floss" podcast. But not everybody can meet up in person, and not everybody has the tech/digital chops to co-record a conversation and get the file to you.
Thanks.
Ben