answer:I’ll start the thread off: Easy/already existing in mods: - Hunger, Thirst and Fatigue system – Hot air baloons or other flying machines (Possibly coming in the adventure update) – Rivers, better liquid phiysics – Actual deep oceans, with possible underwater caves, ruins and the like – Flood gates – Better Nether portals implementation. Being able to place more portals in the same area without them crossing over eachother (Maybe by using a particular block for the corners or something) Harder stuff: – Ropes, elevators, aerial tramways and grappling hooks (Especially now that notch is implementing underground ravines) – Live-in transport, like actual ships or bigger trains with actual rooms and stuff like that (It would make sense with the actual oceans thing paired with the need for rest)