Love that city, it's awesome. Was there a little over a year ago...we rented this
AirBnB in Prenzlauer Berg in what was once East Germany. Was a great plave in a cool, "real" neighborhood, and very close to U-Bahn, which can get you all over the city. Berlin's a great city to just walk and explore...outside of the standard touristy sites (Brandenburg Gate, the Wall, Reichstag, Unter den Linden, Museums, etc...which are great btw) there's tons of quirky spots to check out. We went on a "street art" walking tour, which was pretty cool, I'd highly recommend. I can't find the actual name of the company/org we went with, but if you do some research I'm sure you'll find a good one. For a really good, authentic Schnitzel, in a very casual environment, check out Imbiss 24 (also in PB). There's some cool cocktail bars, too...we checked out
Buck and Breck in Mitte, which had great drinks and seemed almost stereotypically uber-cool German in a "Sprockets" sort of way. For Biergartens, you can't beat
Cafe am Neun See in the Tiergarten, or, for a more local experience, try
Prater Biergarten in PB. Let's see what else...The
Ramones museum was pretty cool, and a brief stop if you're into music. I'm sure there's more, but I'll stop...I'm sure others will have some great input, too. Jealous!