In late-2010, I knew nothing about archaeology. After three-plus years as a senior editor at Archaeology, I consider myself knowledgeable on at least one arcane subject: the peopling of the Americas.
I just finished a large project that I spent a lot of the last year reporting for Archaeology. It included meeting a lot of great characters, as well as a trip to the Paleoamerican Odyssey conference in Santa Fe, NM, last October. It was an occasionally testy meeting with prominent archaeologists whose theories had been summarily dismissed for decades by their peers finally having their day in the sun.
I would have never guessed it, but I find this topic really exciting.