I'm a big fan of the concept of "code smells" - the notion that you can subconsciously evaluate the elegance/correctness of a code by how it "smells" to you. Similar to "beauty" in mathematics or physics, I suppose.
For example, when touring the Pachyderm codebase, you can tell who wrote it by the smell. King's code smells like a tropical beach. Clean. Breezy. A place you want to spend the day hanging out.
My code, on the other hand, tends more toward a downtown back alley - functional, not the cleanest place to be, not someplace you want to spend a lot of time, and often smelling oddly of fish.