Aesthetic taste

by look i have opinions

Is it important to have good taste in art (and/or entertainment)?

Is it important to have the idea of artistic greatness?

Is either of those important to an artist? They seem to inhibit certain forms of inspiration; they also seem to provide inspiration of their own, as well as guidance. Well, then, do they tend on the whole to make an artist’s work better?

Is the idea of greatness directly connected with the experience of it? Is the idea a necessary precondition of the experience?

What aspects of taste cannot be defended objectively? Or is it even possible to specify them?