There's this "loud obnoxious American tourist" stereotype. Obnoxious? Rarely. Loud? Yes, every time. A lot of Americans who come to Scandinavia comment on how silent it is, while the Scandinavians around them are thinking "It's not silent. You're just talking so loudly you can't hear the crowd around you"
Luckily for American's there's always the Icelandic people. This isn't a stereotype as such, but anyone who has lived next to Icelandic people know how loud they can be (and I have lived next to MANY), so it's no wonder that Americans tend to love them. Icelandic people also tend to be more "walk up and talk to people" types which fits the American culture quite nicely.