Tasty, Fast and Cheap.
Since I work in downtown Seattle, and am rarely prepared enough to have made myself a lunch to take to work, I often purchase lunch from one of numerous options near my office. Similar to the cheap-quick-good rule of software development, I aim for my lunches to meet two of these three criteria:
If an option is tasty and cheap, I'll probably back. Or fast and tasty. If a restaurant is slow and expensive, I probably won't be back. Of course, tasty, fast and cheap would be great!