Good code feels obvious and self-evident, as though its design springs directly from the problem, rather than from the cleverness of the developer.
Good code is free of regret; regardless of how much it's been modified and refactored, it feels as though it was written in a single sitting, by a developer who somehow knew the right way to do it already.
Good code is not just readable, but inviting. It feels as though there is no wrong place to start reading it.
Good code doesn't have a single goddamn class named "Manager".