I don't prefer one over the other -- there are many great bands in each, and many mediocre ones as well. Although I might argue that bad prog is far more grating than bad blues.
Blues-rock the best kind of rock music. I enjoy progressive rock too but it doesn't quite match the enjoyment I get from listening to blues-rock.
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.