Yeah, I'm similar. For me, it's either my interest in fantasy that fuels my liking of medieval history, or vice versa. Though, we were never taught a great deal of medieval or ancient history in school, which is a shame, so I can only read history books on these (which is fun in itself).
Early modern is also great. I find Elizabethan England interesting, as well as the English Revolution/Cromwellian Protectorate. But I guess my favourite piece of modern history would have to be the Soviet Union, West and East Germany.
Well there's something interesting. Didn't know that Do you have a source? It's not that I don't believe you, it just sounds like something that'll be a fun read.