Western Germany had the beginnings of a globalized economy and membership in such organizations like the European Community and NATO. The former East Germany is still being propped up by massive subsidies as capitalism is still waiting to be accepted by many Easterners. Not all is bad but there is still a difference economically.
Education is another problem. Propaganda on was used to explain why there were differences between West and East and not liberal education hallmarks like debate and reason. History was simplified to Nazis bad, West bad, Communist good. Teachers worked with the Stasi to make sure questioning students and teachers were kept in their place. Meanwhile teachers from the left and right ensured lively debate in West Germany. Today educational differences exist with startling results.
Politically the landscape is a mess. In the west two major parties, the center-left Social Democratic Party and center-right Christian Democratic Party engage in European politics with smaller parties like the Greens and Federal Democratic Party playing roles of king maker. Eastern Germany now has the everything-but-in-name East German communist party called the Left Party making serious gains and the neo-Nazi National Democratic Party is starting to win local elections.
The ghosts of the Berlin Wall, East Germany, and other divides exists because of the lack of cultural preparedness. The eagerness, rightly so, to reunite the country did not take into account the economic costs for the west and cultural realization of wrong doing for the east. These factors are being weighed along with Germany's example by those who seek reunification of Cyprus, Moldova, and Georgia. It is, in part, the above reasons why reunification is slow coming in those areas.