Number 15: The Farlands!
Number 14: Brick pyramids!
Number 13: Notch drops a golden apple!
Number 12: Winter mode!
Number 11: Steve Co. Supply Crates!
Number 12: Dock mobs!
... etc and so forth.
it's really strange to be, effectively, a "fandom elder."
i'm not sure there's any piece of minecraft trivia from before roughly release 1.7 that i don't know, somewhere in the back of my head.