Quite a bit of our questions have (at least at some point) been closed as primarily opinion-based. I adapted a query that shows all posts that were closed with that reason, ranked by total votes. At the time of writing, there are 19 questions in there. (Though not all closed questions are there, since the data was last updated 2 days ago, so there are a few more questions.)
Taking into account our topic, I think we can not be as strict as a site like StackOverflow when is comes to subjective questions, but we obviously can't be too lax either. An excellent, (almost) canonical view on this matter is expressed in Good Subjective, Bad Subjective.
In this blog post, Robert lists 6 guidelines for great subjective questions:
- Great subjective questions inspire answers that explain "why" and "how".
- Great subjective questions tend to have long, not short, answers.
- Great subjective questions have a constructive, fair, and impartial tone.
- Great subjective questions invite sharing experiences over opinions.
- Great subjective questions insist that opinion be backed up with facts and references.
- Great subjective questions are more than just mindless social fun.
I really urge you to go read the whole post though, because just summing up these guidelines without further explanation doesn't do it justice.
Now I ask you, after reading that post, to have another look at questions that were closed as opinion based (and possibly reopened after) and tell me what Good Subjective means for our site and if we are being too lax, too strict or are perhaps getting it wrong in some other way.