There are things in this world that are rarely seen. Blue diamonds. White Rhinos. Things most people don't see once in a lifetime. There are other rarities, lets name a few.
Female comedians that are both funny and attractive. Most of them are neither, this actually applies to all comedians not just the female ones. There are a few. Sarah Silverman is a good laugh, and easy on the eyes. Aisha Tyler comes to mind, and is a great voice actor too. Really would like to have a third example, but sadly can't think of a third that is both funny and attractive. This is very subjective, beauty and comedy are in the eye the beholder.
Anything that actually lives up to all the hype. Getting blown, that lives up to the hype... in fact that need more hype. "Goodfellas", great movie you should watch. Seeing "Penn and Teller" live. Finally reaching a long term goal. Most things just aren't worth all the hype, finding religion, giving a shit in general, being a productive member of society, and more, all way over hyped.
Blogs that are actually worth reading. Most of them are just some asshole rambling on about unimportant shit. Oh wait... well damn...