Okay, if you enjoy history try The Decline And Fall Of The Roman Empire (Volume 1) - each volume is around 48hrs each, it might sound like a lot of hours listening but it's a great book and taught me a lot about Roman history. If you're into sci-fi try the old BBC radio series Journey into Space, Operation Luna (the first in the series).
I've enjoyed biographies of Augustus and Hannibal on Audio CD. "Augustus" is by Anthony Everett, and sadly I can not find the Hannibal set at the moment. Both lived during at an incredible time of change in Roman history. The stories are interesting, each is better "written" than many a Hollywood drama.
Also, it is just fascinating to listen to accounts from pre-Christian times. The characters share many common human traits with us, but are also deeply different. It will make you question what it means to be human.