Once upon a time, a historian told me that the most important choice a new historian could make was of his or her specialist subject. Most of the good stuff was far too overcrowded, so you had to pick about in the exotic and extinct. His recommendations were the Picts or the Minoans, because hardly anything was known about them and you could spend a happy lifetime of speculation.
It's a great historical joke that when the Spanish met the Aztecs, it was a blind date made in serve-you-right heaven. At the time, they were the two most unpleasant cultures in the entire world, and richly deserved each other. Still, the story of how stout Cortes blustered, bullied and bludgeoned his way to collapsing an entire empire with a handful of contagious hoodlums is astonishing.