I want lots of new Survival Mode features. While I like the capability of command blocks in Minecraft, I feel that there has been too much focus on Creative Mode features, and there should definitely be, in my opinion, lots of new generated structures, smarter mobs (might be able to see light sources), harder hard mode (mobs can break certain weak blocks like wooden planks, glass panes, and dirt), better villages (can spawn in more biomes, generate more realistically, and smarter villagers with better AI). I also think hoppers should be replaced with something that can carry items all directions, including up, like Buildcraft pipes or Thermal Expansion itemducts.
