Well for starters the word "Viking" means for one to go raiding(to go viking). The bad reputation given to the Danes, Norwegians and Swedes "Viking" activity was do to the shear speed and brutality of there attacks killing indiscriminately taking everything they could fit on a boat then racing off. The "Vikings" were also pagans and all pagans were seen as heathens to Christendom.
The Danes and Norwegians early on mostly attacked Christian sites in places such as France, Ireland, Germany and Island of Britain. They would later come back to settle and in the case of England and France becomes rulers, in Ireland they founded the first cities. The Swedes on the other hand mostly attacked in the east in places such as Finland, the Baltic states, Russia and the Byzantine Empire.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.