Is it sharable?
Most things I seem to care about are sharable. There's a certain enjoyment in sharing. Sharing an experience, a story, something one has learned, a piece of good information, a better way of doing things, a spiritual revelation, sexual ecstasy, whatever it may be. Nothing is quite so much fun if it can't be shared. Even if it is a deeply personal experience. Then maybe you'll share your subsequently different outlook on life, or you'll go around emanating a different vibe.
I'd also go as far as saying that in most fields it is good that something is sharable, and bad when something isn't sharable. In fields such as technology, communication, information, politics, art, or just about anything else I can think of - if something useful and desirable is sharable, it can benefit many people, and possibly the world. If something considered useful and desirable is not sharable, but is only available for the select few, under very limited circumstances, it is probably a waste of resources and the world is bereft of a potential positive benefit.