When it comes to sightseeing, Berlin has a list as long as your arm plus I find the history around the wall utterly fascinating, but you do have a point. Take all that away and you're left with a sprawling city that's no better or worse than many others in Germany IMO. For me, Germany has many other smaller towns and cities that are a must see. I've been to Aachen, Nuremberg, and Leipzig recently and would recommend them all. The most picturesque of the lot though is Rothenburg ob der Tauber, and there's a fascinating story as to why the Americans spared it from being flattened at the back end of the second world war.