"They do totally make me feel like a kid listening to a radio drama set back some time in the '50s."
Yeah me too. From a very young age I thought it would be cool to have lived in the 50s listening to radio instead of TV. I even bought one of those vintage old bookcase radios to give my radio drama listening habits a more authentic (though anachronistic, since most of what I listen to was made in the last 30 years) feel to them. If your a Tolkien fan by any means at all, there is a good deal of his works adapted to very high quality productions done by the BBC. The Lord of the Rings adaption is quite good.