Berlin the capital of German, the city which used to locate the Iron Wall which separated the WEST an the EAST (political ideal).
Unlike the rest of German, people in Berlin tend to be more lay back and enjoy life more, it is due to the Cold War history event, that has influence a lot in this city. Berlin is one of the few city in Europe that you could find the Communist architecture lie not to far from the Modern building.
Berlin is a relatively young city by European standards, dating to the thirteenth century, and it has always had a reputation as a place filled with people from elsewhere. It may seem tough to find someone born and raised here! This is part of Berlin's charm: it never gets stuck in a rut.
A certain uneasy detente still exists between some former residents of East and West Berlin (and Germany). Wessi evolved as a derogatory nickname for a West German; its corollary is Ossi. The implication here is that after reunification, the West Germans automatically assumed the way they do things is the right way, and the way the Easterners should start doing it, too. Westerners got a reputation for being arrogant. They saw the Easterners as stubborn Communist holdouts interested only in a handout from the "rich West."
Anyway let just forget about the rich and the poor, in Berlin for you would find that this city is so cheap!!! (Compare with Western Europe standard) Even compare with some Asia city such as Seoul, Shanghai, Bejing, it is still way cheaper. You could easily to find a cheap meal (Kebad, or Vietnamese foods, Chinese Foods, for less 8$).
If you have any question concerning about traveling in Berlin, just drop me a message, I will try my best to show you :)!