In the interest of time, I'll spare you, dear readers, my usual spiel and say simply this: I like official accessories. In theory, anyway. I like the idea of accessories specifically made for specific devices by the device's original manufacturer. I've been delighted by the Nexus 7 pogo dock, and love the Nexus 10 pogo charger (though it isn't actually official yet).
Then there's the official book cover for the Nexus 10.