Do the story in the way it really demands to be done, which may mean using several different styles or only one style; but it's still about respecting the story. ↗
Like Godfather, you look at a movie like that, or something that James Gray has directed, a film with minimal or pin lighting as opposed to everything being lit bright and flat, where everything is evident. ↗
One of the problems I have with a lot of movies these days is that everything is too well lit. In the world of digital creations there is a tendency to show too much. ↗
So I look at a lot of stuff now that I did and some of it looks tame to me, but my interest in terms of what I want to say with it is a little different. ↗