So, Ulrich, if I understand correctly, you are referring to general appeal rather than general subject matter. Right? I think general subject matter is stock.
I am a bit troubled by the idea of letting one's art become a function of how people will receive it, in a generalized way. I do realise that in the real world one has to sell prints that appeal to people, and there is some artistic compromise implied in that economy. But... one thing I definitely don't want polluting my thoughts when I am out shooting a landscape is whether people will get it. I am busy enough deciding whether I am getting it, when I take the picture. It's so easy to walk away from a scene with only a superficial impression as a photograph.