Everybody has her of his own view on that matter, which is understandable because the appreciation of arts goes through the artist's and the enjoyer's individual psyches. And besides that everybody has her or his personal preference. Especially the last mentioned fact is generally used to explain that there are no rules for so-called objective judgement. It is generally accepted that the appreciation of arts can't be discussed. So nobody can prescribe how a work of art shall be.
Art is unpredictable.
Yet there lies the inescapable fact that the arts are manifestations of the truth, representations of the only really world. By consequence, there is a difficult problem for modern man. His analytical tradition tells him that the truth only can be obtained by impersonal inquiry and reasonable discussions between experts. If these criteria are lacking, he finds that the matter has no reliability. But, concerning the arts modern man will turn a blind eye to it, just because of the fact that he considers it as a matter of accidental feelings without any practical value.