Another interesting difference from my German experience is an outwardly focus on the positive. In Germany there is an unofficial saying "Keine Kritik ist Lob genug." ("No criticism is enough praise.").
Another thing that I noticed with some, was the need to save face. Even though a lot of my colleagues seemed very confident, brave and open at first glance, I slowly began to register that it was oftentimes outward pretense.
With some colleagues, I learned that they wanted (or needed) instructions to a level of detail that surprised me.
Another thing that startled me was the perceived difference in attitude towards work. I had heard about the New York hustle and "Live to Work" mentality and was excepting to find colleagues who were driven and passionate about their job.
I also found it very unusual, that people would not make eye contact or greet one another walking by or when they ran into each other in the kitchen.