France. I’ve been to Paris in particular more times than I can remember and it strangely feels like a second home. Learned the language a bit which helps too.

Although I’ve not been to every country in the “region” (however you want to define it) but I’ve always been fascinated by the Balkans (western in particular but also what could be described as the eastern part more broadly too). I’ve probably read more history/travelogue books or articles about this region than anywhere else in the world minus perhaps Wales. Could say the same for Central Europe of a particular time in history too (basically from the old Habsburg empire up to the WW1 and between the wars).

Always had a strange fondness for Belgium too.