I was playing on a faction server, and found the most powerful faction's underwater base. All of their entrances were sealed except for one randomly opened piston door. When I got inside I found 3 double chests full of diamonds, and a seemingly unlimited supply of enchanted books.
I love these posts. They really bring out people's ideas. Anyways, I would add customizable swords. Some could be just for decoration, while others could be used for killing.
I would like for testificates (villagers) to have the ability to make their own villages larger, have the ability to wield armour and weapons, and be able to properly defend themselves.