For some reason, it seems to me that music and the 2D arts have less low-hanging fruit in this regard. I suspect storytelling (novels, TV, movies) have more potential for an objective "good" standard, being that they have more of specific task to achieve. But even then, there are a lot of useful post-modern (two words I never thought I'd place back to back) ways of messing with the status quo. So maybe the question becomes "If you want to do X, here are some really reliable guidelines for achieving X." I'm not sure how much sense I'm making. Hmm. An example might be: The Wire and Law & Order are vaguely similar shows with different goals, but one could argue that the goal of The Wire is more nourishing for human beings. Like a salad made from veggies you grew yourself versus a fried Twinkie. Of course, a fried Twinkie has its post-modern perks, but ultimately it isnt good for you.