I find documentary music instrusive - very annoying!
I watched "Allies at War" the other night and I got seriously fed up with the sound of bloody clarinet playing deep dark notes in the background while the narration was going on and while important war documents were being read. All through the programme the guy with music button seemed to be trying to win an oscar!
They are all at it. "Dambusters Revealed" also had a lot of uneccessary music, which doesn't in my view add to the programme. Bombers attacking a dam isn't the place to put music! Then Discovery Wings has too much music, so do many other programmes. What is the matter with producers these days? A good narrative well spoken is far better than the terrible choice of music they use, or music at all.
Well that's my view and I'm sticking to it.