Structure is important but not at the expense of passion. No one reads a book or goes to a movie to experience a great structure. Authors come to a story to express their passions and readers and audience members come to ignite their own. While structure is the carrier wave upon which passion is transmitted, without the passion, it's just noise. Conversely, passion without structure can be full of sound and fury yet signifying nothing. So find the proper balance. Let passion be your captain and structure be your guide.