I think more people should try to create their own podcast. I've been doing my own podcast after being a guest on a couple episodes of another tech podcast and I can't recommend it enough.
I think it should be treated like the low barrier to entry medium it is.
Current favorite podcast is the indie hackers podcast. Sometimes something you hear is more impactful then reading the equivalent.
I prefer podcasts to audio books usually as podcasts are meant for audio whereas audio books are just adapted to the medium.