I suggested this in another thread, but I still think it would be a great idea for the Xbox since it can be played locally on splitscreen - which makes it likely to be used for family-oriented play with small children involved. I would like to be able to place locking chests (perhaps 1 per player), using a player generated password to open them (that would be **** out on the screen while being entered). The chests would have to be made so that they can't be mined when locked. This would not stop the more serious levels of griefing that go on, but, as a parent, I think it would curtail a lot of the pilfering of chests young siblings do to each other and help prevent some of the crying that can get started as a result.
I would love to see more animals and maybe animal specfic to bio like:
Snow/Water = Penguins
Snow = Polar Bears
Desert = Scorpions
Tropical/Jungle = Monkeys
Tropical/Water = Dolphins
Mountains = Goats (I think this would be perfect for the game plus you could milk for Goats Milk)
Everywhere = Birds maybe different kinds where you are like a Macaw for the Tropical Region. (Not holding my breath on getting birds, but the Goat and Penguin would be awesome!)
I also wish that killing wolves would have a 0 - 2 chance of netting you a wolf pelt that you could use to make fur armor like with leather and leather armor.
Oh and I would also like a scuba mask to be able to actually swim underwater for a while and colored glass.
It would also be cool if redstone circuitry wasnt so confusing and easier to use.
Some different enchanments would be nice or maybe being able to enchant different things. If you could enchant a stack of something at a time like say, TNT with fortune or silk touch, for the xp level cost of enchanting one pickaxe you could enchant a stack or half a stack. Making it a pickaxe would take a bit longer to mine things, but it would smelt the ore being mined. Could be nice.