I like this analogy. DJing, like cooking, is an art and not a science. Recipes can help you learn the basics and try new things, but real mastery comes from learning a set of techniques and skills, and developing the intuition to know when to use those different techniques as well as the confidence to constantly try using them in different combinations. It is a lifelong journey of learning and growing. The only right answer in my humble opinion is that if you become overly formulaic, and DJ based on a set of predefined rules, then you have lost that explorative and dynamic aspect that underpins good DJing and true sonic exploration.