Beautiful nature, lakes, canals, and parks
It's a pretty city, in some parts, but "Europe's greenest city" is just bullshit. And maybe technically there are more canals than in Venice and Amsterdam, but in reality you'll find that you have to walk quite a bit to get from one canal to the next, where in Venice and Amsterdam they are a defining part of the city.
Berlin’s central location makes it easy to travel around Europe
Around Eastern Europe, yes. Travelling to the UK, France, Spain, Italy, or Switzerland is easier from other parts of the continent.
The amazing, delicious döner kebabs
I like kebabs as much as the next guy and it's probably true that you can get the best ones in Berlin, but let's be honest, it's drunk food and often made from questionable ingredients.
That said, there really is lots of awesome food in Berlin in all price categories and from all the cuisines of the world. In fact, eating out in Berlin is such a great experience in general that I'm not sure why kebabs deserve special mention.
Again, I love Berlin and maneesh's other points hold true, I just don't think it needs to be glorified beyond what it is -- a wonderful, amazing city that isn't the most pretty one and isn't really the very best location in Europe in terms of climate and travelling options.
@maneesh: don't take this the wrong way, glad to hear you've had a great time, sounds like a lot of fun!