The context is totally the most interesting part, including the way things do repeat...especially for someone like me who has trouble remembering chronology. This makes everything make that much more sense. The other thing that has proven interesting is getting a fuller picture of presidents and events by reading about them in very different surrounding books. I was trying to avoid the 1000-page Jefferson biography, but he's played such an enormous and contrasting role in both of the first two biographies, far more than Washington and Adams played in each other's. So I think he deserves a huge book. That dude was ALL over the place.
But right now I am reading "Bonk" by Mary Roach and some Sam Shepard plays.
Great suggestions in this thread as always.