If you want to know more about Berlin, may I recommend my go-to source for all things Berlin, @city-of-berlin?
She has made many of the same observations you have made, only she goes into greater detail. As a native of the city, she also offers readers insights into what to expect as well as historical context for parts of this historic city.
She even compares her Berlin to another of the world's major cities, London, in a series of posts she has featuring these two cities.
If you have questions about Berlin, @city-of-berlin has the answers!