Have the same issue with Poland. We need this damn Central Europe category so we can escape the dreaded "Eastern Europe" badge... And since we are in no way Western, Central is the only way. </sarcasm>
Unless we speak colloquially, then there's an infinite number of groups to qualify. The OP should use some reference to choose categories ( http://news.ycombinator.com/item?id=2147290 ), his are a bit strange and subjective.
Compare that to the amount of options for the US with its 220 mio population.
I'd propose a schema like this: http://commons.wikimedia.org/wiki/File:Europe_subregion_map_...