I was incredibly impressed with Copenhagen. It is a city where I would be very happy to live, if given the opportunity. The people are very nice, although it is true perhaps a little inverted, and everyone is absolutely, astonishingly beautiful! The city itself is also very beautiful and there is plenty of really cool stuff to do and sights to see.
Insider Tip:If you are there when it is warm, buy beer from a grocery store and drink it outside. It is legal, drinking in bars is incredibly expensive, and it is what the locals do! Also, if you are looking for the metro at the airport, and you probably are, it is upstairs. There are other trains below, and they will get you to central station, but they will not take you directly to either of main metro stops.