Hello dear Delcampers!
Im glad to see recently all those categories classified and it makes quicker to look for what we search, yes, in those major countries.. But, what about the others??? Small countries such as the Baltic republics, Scandinavian or Balkan countries and so on? I think it would be productive by adding at least there are 2 basic categories: Old and New. For example, pre-WWII (1945) and post-WWII categories in each countries. I often look for the old Baltic Republic's stamps and I have swim in this mixture of recent ones and pre-war ones.. I think lots of people have the same experience..