Personally, I'd want them to have a final ending, especially since I think I read somewhere that it saves before it ends so you can always go back and do whatever else you wanted on that character.
Broken Steel just made the ending feel kinda cheap to me, it wasn't really the "End" yet it was the only one you got.
EDIT: Since FALLOUTFTW let me in on a secret everyone seems to know but me (:P) the poll was semi-useless.