[darkcore]

definatly stick to the bigger citys: berlin, hamburg, munich or cologne.

the redlight district in hamburg (called reeperbahn) is pretty interesting (maybe not as much as the one in amsterdam, though) and there are a lot of clubs and bars and other places to visit.

in munich you should visit the hofbrauhaus and of course a game of fc bayern muenchen in case you have the chance. there are also enough sites, clubs and other stuff so you can spend some days without boredom. but skip the redlight district.

when you go to cologne (not so interesting besides the 'koelner dom' imo), head for duesseldorf. not because duesseldorf is such a beautiful city, but there are a lot of good bars in a part called "altstadt".

oh, and in december you'll stumble across something called weihnachtsmarkt (christmas market). they'll be in every big city. visit one and get drunk.

forget the rest of the country and post some pics.