We talked about this in my online writer's group once. The general concensus was that
(1) Titles are just dang hard
(2) If you can find a perfect fit for the book, you're dang lucky, and
(3) The publisher will probably change it for marketing reasons anyway
When I write short stories -- which generally aren't retitled by the editor -- I look for something that ideally serves three purposes. It should be memorable, so that it will help people recall the story. It should have thematic resonance, meaning that it adds extra depth to the story. And it should be intriguing, so that it will entice editors to read the manuscript.
Since I stink at titles, I seldom manage to fulfill all three purposes at once.
