It didn't resonate with me. But everyone has their own experiences. Below are some of the good and bad from my experiences:
1. Transportation is amazing. Not having a car is a non-issue. The most I waited for a train was 10 minutes.
Drinking and smoking are allowed in the underground stations. Personal freedom often trumped collective consciousness.
2. Rent is cheap. But I found the city rather ugly. When I asked a resident why they have so much "bad graffiti" she commented that it was to make it ugly. Further questioning and reasoning was that ugly correlates to cheaper rent.
3. So much dog shit. Perhaps because there are a lot of dogs. They are very well behaved. But the poo was everywhere.
4. We stayed in Kreuzburg. It's trendy. Which means that it's mostly occupied by unemployed artists. :P
5. I speak very poor German, but Berliners are incredibly friendly and mostly patient.
6. It doesn't really feel like a big city.
7. They had some nice galleries and museums. Architecturally I don't think I saw anything significant, or that sticks out in my mind.