Not too sure in terms of statistics. But personally I look for articles relevant and useful to me, then whether it looks interesting and easy to read.
I agree, it needs to be a topic that you have at least some interest in, otherwise they won't bother looking any further. Once the title appears you need to make sure that the contents of the hub draw the person in and make them want to read more.
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.