We have somewhat of an on-going problem in that "community wiki" is not perfectly defined (and even so far as it is defined in the stackoverflow world, it's conceivable that it should have a different meaning in our context).
Questions such as
do not have objective answers. Yet, they "feel" different to me than questions like
So the question is: how should we define "community wiki" for our site? Should "list" questions be community wiki, but otherwise subjective questions that are looking for a general answer be left alone?
One reason that I raise this is that making a question "community wiki" removes some of the incentive to provide great answers, but IMO questions such as the former two above require effort and good answers should be rewarded.