"I like ideas, especially movie ideas, that you can hold in your hand. If a person can tell me the idea in twenty five words or less, it's going to make a pretty good movie."
- Stephen Spielberg
I also learned, recently, that more- aside from exhausing- isn't necessarily better. For instance, I'm trying to reinvent a world from scratch and...it's kinda silly from a certain point of view. I can't help myself, but I know this and can appreciate the reason G R R Martin chose to model his story off the British Isles, Europe, and it's history. It saves him so much work having to actually invent things from scratch. The things he brings up already has a conceptual basis so people are not so bogged down by the details that they can actually engage in his complex plots.
Best to be simple in scope.