I'd probably be the resident expert on the legend and mythos of the King Arthur story, and the modern re-surgence of interest in fairy tale and folklore archetypes.
When I was about 10, I got completely obsessed with the legends of Camelot, and read every book in my library even remotely connected. The way my mind retains interconnected details...I don't think I've forgotten any of it.
The fairy tale thing...well, it's just so interesting. Most folks raised in the Western world spent a good aprt of their youth immersed in, essentially, the same tales. They form a layer of the bedrock of our subconscious, and understanding those stories, those amazingly simple, complex stories helps you understand people. There's a reason that there are mental/emotional complexes called "Beauty and the Beast" complet or, "She's got a Cinderella Complex." It's shorthand for some very complex ideas.
Sorry, I'll stop now, I could write a book on all this!