As a former history grad student who does not use his degree, I have, for the last few years, found myself drawn into a random subject and going about learning as much as I can about it, like I would in school. So far I have taken on evolution, New Testament textual criticism, Mormonism, the Beatles, the "history of the book" in America, and the mapping of the human genome. I am looking for a new challenge.
Here are some things I am interested in, but am definitely open to new suggestions, hoping something will strike my fancy:
Most any philosophical subject, science stuff (I favor topics in biology), what I call "social movers" i.e., things that throughout history have caused geographical shifts of populations - hence my infatuation with early Mormonism and early Christianity, maybe something Technical as Randall Munroe suggested here
and I really dig Cartography.
Here are some things that I have tried to get interested in and failed: Architecture, Music Theory, a few different attempts at various aspects of finance/economics, American Politics.
Thanks a ton for any suggestions.