John Ottinger of Grasping for the Wind asked that question.
More importantly, he asked ME (and a few other folks who’s names you might actually recognize).
I already know the answer to the title question – but you all might not, so head on over to John’s place and see what some of the best and brightest in the field (and me) had to say on the subject.
Nice thoughtful answer. I saw right away that most of the respondents were going to pick a novel, while like you I thought the questions was a more generic one of what KIND of endings were best.