I saw Morgan Freeman on Conan O’Brien a while ago where he spoke about how he had voice coaching when he went to actor school. Morgan Freeman has that nice deep voice that’s never annoying (in other words, he would suck as a sports commentator), it was very apparent in the great documentary “March of the penguins”, in case you haven’t seen it.
One thing he said on the Late Night that caught my attention is that most people speak in a higher pitch than what is natural. So that deep dark voice is something he trained to get by speaking in a slightly lower pitch. Perhaps something to think about for your next podcast?