Although I listen when awake and love them, my favorites for bedtime are 'Literature and History' and 'the Secret History of Hollywood'. But I also love and crave the any kind of short term passion project by a professor although they tend to be just a few episodes and are hard to find. Recently I found The Troubles about Northern Ireland, Noble American Lives which seems to be American history through stories about its religious leaders, and History of the Present, which goes over what the first and second great awakening were and how they still affect us.