None. I think it's just wrong that obnoxious teenage girls pair up the worst people, like Harry and Draco, or Hermione and Ginny. The meaning of The Harry/Draco pairings are because teenage girls want to imagine the "hot" Dan Radcliffe and Tom Felton in the same story.
It's meaningless. I would rather read a fanfiction that at least follows the plot of Harry Potter.
Snape and Lily in the past as JK Rowling didn't give much detail, so we are free to decide what happens between them.
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.