I call a houseboat in Amsterdam home. Have you ever visited the city?
No, but it's a place I'd like to visit one day. 
As the capital of Netherlands, it has the most people -- but like many European cities, can still have a small town feel and charm.
I've been to a few cities in Europe, and they are a lot more cozy than most of the major US cities I've been to. 
Do you have a favorite spot? We adore Italy, and often visit the capital city, Rome.