People having varied tastes means they also have personal tiers of quality. This is the top tier -- works you think are just that good. They are So Cool It's Awesome. The works you just want to tell all your friends about, unless they already like it too. If you had a Top Ten List of your favorite works in a medium/genre/etc., these would be it. When the corollary of Sturgeon's Law states the remaining ten percent are worth dying for, these are those works. Often these works are just obscure things you really like, and sometimes they can become blockbusters, often influencing other works.