The only ones I ever found were just a host talking about some topic and having guests on...that sort of thing.
On Pinterest a few months back I saw a quote that someone put up.
'When life seems unmanageable just remember that it is and you can't survive for forever'
until I got my first iPod in university.
I listen to so many at the start that many of them I stopped listening.
Now I listen to ~26 ~1/4 are history related, ~1/4 are film related, ~1/4 are science themed and the rest are random assortment