Michael Piller said this quote

“ As I approach a new project, my process always begins with the question: what is it about? Here’s one answer that might apply to a Star Trek movie... I want it to be about the most horrible, treacherous aliens ever known to man who are about to destroy life as we know it, leading to the most spectacular thrill ride of an adventure with fantastic space battles and huge explosions and great special effects -- a white knuckle ride for the movie audience. Yeah, but what’s it about?I can write space battles with the best of them, but what makes that space battle interesting to me is: why are they fighting? What are the stakes? What does the hero lose if he loses? And what does he win if he wins? Why should we care? I'm talking about the second level of story-telling. The level that examines what's going on inside the characters — their moral and ethical dilemmas, their doubts, fears, inner conflicts, how they change as the story progresses. These are the things that make us, as members of an audience, get emotionally involved. ”