A big difference between podcasts and radio is the intimacy. Radio oftentimes feels big and loud. To me, podcasting is closest to that weird late night stuff, whether it's late night love song request lines, or it's some talk radio show where you feel like you're the only person listening to it.
The old Johnny Carson 'Tonight Show' was great in that he was so good with the guests, and it was not about him. I think he was very smart in realizing 'I have plenty of screentime on this show. I do my monologue and we do sketches and stuff like that.' During the interview, he really made it about trying to bring the best thing out of the guest.
Part of our job is to dig deep and rediscover the joy that we had when we were first starting out. Also, when you gain responsibility, if you are the host of a TV show and you have responsibilities as a producer and a writer and so forth, you then have to deal with the mechanics of it, which is not always fun.