As I've listened to more and more of it, I start to gravitate not to particular topics, but to particular experts. There are many guests who are regulars when topics in their field come up, and the good ones make any topic in that field interesting. For instance, if there's an episode about religious history and Martin Palmer is on it, it's bound to be a banger (listened to one on Augustine's Confessions recently, for instance, and it was great). Same with Ancient Greece and Paul Cartledge and Angie Hobbs. If I'm looking for something to listen to, I just put one of those three into the search field of my podcast player, and I'm never disappointed.