A country that is incredibly rich in historical significance (both good and bad), cultural traditions, art (historical and modern), regional variety and nature. Cities are walkable, public transport is mostly decent (it's perfectly fine to live without a car if you're in the city), crime is low, poverty is low, the economy has been tanking a bit recently, but has traditionally been doing well.

In terms of mentality, Bavarians are very different from Rhinelanders who are very different from East Germans. Berlin is a bubble in and of itself and can't really be compared to the rest. In general, Germans tend to take comfort in clear rules and structure, and are used to a certain kind of cutting through bullshit, both of which may be a good or a bad thing. I'll also add that, to my knowledge, no other country has reflected its own role in history as deeply and critically as Germany has, which to me comes as a bonus even when there is a tendency to overcorrect.

Food is IMHO not great (except Käsespatzle), but beer is some of the best in the world.