Comments Elsewhere

How about the good old English word “preference”? Normally we use this to refer to what people have vis-a-vis preferred objects, not what the objects have vis-a-vis the people who prefer them. But I don’t know that that’s an iron law. In any case, if you don’t like saying e.g. that an additional diamond has greater preference on the margin than an additional unit of water, you can always play with verbs: takes greater preference, commands greater preference, enjoys greater preference, etc.

Or, if you want, there are always “preferred,” and thus “preferredness” in noun form. That’s an ugly word, but it’s certainly no uglier than “wantability.”