Sweden, Norway and Denmark- What are subtle differences as well as nonmalicious stereotypes of each?

Answer 1

Although I don't think there is big differences between the people. The stereotypes are that Danes are calm, acceptant and open, Norwegians are introvert, shy and avoid risks, while Swedes are overly correct and punctual.

I do not think this reflects people very well though.

Read more by a famous Social-antropologist (Hylland Eriksen):

http://folk.uio.no/geirthe/Scandinavian_images.html

Answer 2

Denmark is a fairly flat country, with many big islands.
Sweden has more hills and more forests and lakes, the mountain range that is on the border with Norway is more gentle on the Swedish side.
Norway is rougher in shapes, with forests where they can still grow, and many sharp edged mountain sides and fjords of course.

I have never seen a real difference between the peoples, nor have I heard of any stereotypes I would trust.