[Chris_Newton]

Many good candidates seem to anchor on those two properties (correctness and maintainability) as a starting point. More generally, they tend to identify that some of the properties are directly desirable right now, while others have no immediate value in themselves but are necessary to ensure that you can still have the directly desirable properties later. Which ones take priority under which conditions can be an enlightening conversation, often leading to related ideas like technical debt, up-front vs. evolutionary design, and so on.