Oftentimes, if I need to fall asleep I'll pick a really peaceful one. When I was younger, I had one where I was a full sized person in a world made entirely of legos, including tiny living lego people. I'd fall asleep, dreaming of building secret tunnels under the ocean, vast cities with towers a mile high, train tracks for the lego people that climbed mountains that rose above breathable atmosphere to reach secret veins of special legos. It was only during the day that floods, earthquakes and rival lego people threatened.

On a related note, I have such awesome ideas for a Minecraft mod.

There's a thread running through Methods of Rationality on the implications of patterning your developmental schema on the coming-of-age narrative typical of epic fantasy. (Haven't been able to isolate any specific examples there, but similar topics come up in "Formative Youth".) I'm pretty sure that sort of thing is very common among members of our particular tribe, and it's a topic that I'd love to see explored in more detail; unfortunately, no one I know of has ever approached it in depth, let alone with much rigor.

Might just be another holdover from the EEA, come to that; it's a lot easier to be a hero and save your social world when your social world consists of fifty-odd people, all of whom you know and maybe half a dozen of whom share your particular skillset. But hither lies a Just-So story.