The third and perhaps most crucial rule of the Taco Brew Challenge is that you must, at all times, maintain a delicate balance between the crunch and the sauce. It is a tightrope of flavor and texture that, should you fail to traverse, will result in catastrophic consequences.
Sub-rule 3a: The Golden Ratio of Topping to Filling. A minimum of 3:1 is recommended, but 4:1 is preferred. Anything less and you risk being called "that guy who puts ketchup on his taco." Anything more and you risk losing all sense of self-control.