Among the most fun interviews I did in my 16 years of radio were a couple I did with country/bluegrass superstar Charlie Daniels. We talked about early radio, Charlie's incredible music career, his unique approach to gospel music, his provocative book Ain't No Rag, his bold pro-life convictions, the depth of his faith in Jesus Christ., and more.
I think you'll really enjoy them both. Interview One (from July 2001) and Interview Two (from November 2003).
And then be sure to check out the official Charlie Daniels web site.