I only read RPGs and fiction for the most part
That's not true, I read
Understanding Literature this summer. However, I listen to college lectures in my car. I usually listen to
Great Authors of the Western Literary Tradition (a survey course about, well, great authors and their written works). I'll be done with that in a few weeks. I don't know what I'll listen to next, but I've got about 100 of them at home, so I won't be bored. Maybe I'll go with a science course, like
Einstein's Relativity and the Quantum Revolution.
When I don't have access to a car with a tape player, I'm listening to
Great Minds of the Western Intellectual Tradition. Which is, of course, a survey course on Intellectual history. Going is slow because I can usually take my own car to work. It's also not as interesting. I recently finished
Rise and Fall of Soviet Communism,
Discovery of Ancient Civilizations,
King Arthur and Chivalry, and
Great World Religions. Only the last of which I won't recommend, primarily because it sucked. However, not recommending it is kind of moot because my company has realized it sucks and is releasing a new version in a few weeks.
Oh yes, these are the courses my company produces.
http://www.teach12.com is the site if you're interested.