I want to post a 'community question' that will be titled something like "What is your favorite X"? (where X is some family of mathematical objects - I don't want to be very specific right now although I have a specific example in mind).
It is not a question I've seen before (I searched), it certainly interests me and I think the community can benefit from it. But I am not sure what is the policy regarding those kind of questions.
Is it OK to post questions like this? Is there some rule of thumb for that?
As there's no correct answer for this kind of question, what should I do?