Pretty much as it says in the title.
If you've got good answers to a question but none of them quite click as being the answer you were looking for or a usable solution to your problem is it better to leave the question unanswered and hope someone may come along in the future with some thing or pick the 'best' answer?
My OCD says to choose an answer and not leave questions hanging about without closure, but I'm not sure that's strictly the best criteria to be working on..