I always get really excited to play Minecraft, then, when I play, I'm bored instantly. It's not that the things they're adding are bad, it's that they feel tacked on. The game lacks cohesion. Every world, biome, cave, and village feels the exact same. Desert hardly feels different than forest. Forest hardly feels like forest.

1.10 should be the 'make the world feel alive' update. Flesh out all the biomes to make them feel unique and worthwhile. Oceans feel particularly empty (realistic, maybe, but not great for gameplay). Revamp terrain generation for islands. Add mobs like hostile sharks and ride-able dolphins. Add multiple person boats that you can walk around on with friends. Overhaul npcs and pre-generated structures (villages, dungeons, etc). I want to see random npcs doing what players can do (fish, farm, mine, explore, sail, etc). I want them to have their own inventory where, when I kill them, they drop it all. I don't want npcs to be limited to villages, I want to see them everywhere in the world. I want to interact/trade with them, but with a system better than emerald currency. Maybe some of them are hostile (assassin, feral). I want to find a farmer living on a farm with animals, crops, and barns in the middle of nowhere. Villages should range in size and have different buildings that actually have useful purpose. I want to fend off pirates while sailing the seas. Abolish 'villagers' and make farmer, doctor, merchant, etc unique npcs