the options you have: run this direction, fight this monster, save this princess which means… … that someone else wrote for you. In DnD what you do is totally 100% up to you. The DM has a start, something prepared, but he has no control of where this story will go, because the heroes decide what, when and how to continue. In some way, the heroes own the choices. DnD allows you to be someone different, and with that… … to surprise yourself.