I could easily do other genres. I wasn't asked.
List the genres to pick from? I'm primarily interested in science history at the moment (How do we know what we know, what were the big changes in philosophy over time, etc), but it's much more fun to be reminded of what you're not already thinking about. Currently working on this lil' book on the lambda virus, previous to that was one on oncogene research (Little out of date, but does a good job of following the history up to the 1980s).
Yeah, I can't do it that way. "Give us a list of stuff you're well-read on." It's more like "hey, this discussion came up, and as it turns out I've got an assload of research in my background." Inconvenient, I know, but there it is. As far as the history of science, I'm far more of a populist. I will say that anyone who hasn't seen Connections in its entirety is missing out, particularly as they're all up on Youtube.