Clean, green, picture-perfect (especially Nyhaven!).
We couldn't take any pictures @ the Christianborg Palace (the Queen's Reception Rooms), but it certainly felt different that we are in a place which is currently still in use! (unlike some castles/museums/palaces that we have visited....where whatever action took place in the past.) Understated elegance. and i think that is something that runs through the city as well. not too gaudy, not too elaborate. simple and elegant.
in fact, i felt that Amalienborg palace (the queen's residence) which was our last stop for the day looks kind of drab from the outside! =P (of course we couldn't go in...the Queen didn't invite us for tea!!)