I think if you want a serious discussion on this topic, a definition of what constitutes “German traits” would be absolutely necessary. Preferably unique German traits, because traits like “hard-working” f.e. have also been ascribed to many other nations and groups.
P.S. Regions (and sub-regions) don’t necessarily have famous stereotypes. F.e. I know some stereotypes about the Western Bulgarian groups (North-Westerners, Shops and Macedonians, incl. sub-groups like the people from Pernik, Tran etc), but can’t really think of any about the Easterners (maybe… Rhodopeans are hardy and hospitable?).