What is the Berlin type?
Berlin is not particularly welcoming to posh types, or the kind of people who enjoy high-class exclusive nightlife. You really don't want to park your luxury car on the street.
For everyone else, I'd say Berlin is extremely free and tolerant and generally welcoming.
The outskirts are really suburban more than anything, and completely different.
but the disparate nautre of east/west berlin is one of the best things going for it. especially in the crossover areas like kreuzberg (not kreuzkoelln) and bits of mitte (that haven't been gentrified yet)