This is a repost of my last one, I wanted more response than 2 or 3 people, so please everyone tell me what you think. Also, I had added a few ideas in later, so I wanted to just repost it all together; sorry in advance if youve already seen this post.
Seasons. It would be cool to go through summer, fall, winter, spring. Trees could be covered in snow in winter (or leafless), and they could turn orange/red/brown in fall. Plus it will give the people that have snow worlds a chance to not have to deal with snow for the rest of their minecraft lives :tongue.gif:.
Weather. I think it would be kind of a cool idea to incorporate blizzards, tornadoes, hurricanes, or something along those lines. Or even just rainy/snowy days. It would be a nice change to add things like that.
Statistics. This (I'd imagine) wouldn't be one of those crazy changes to the game that would affect gameplay, but I personally think it would be cool to see some stats in this game. There could be so many stats like: blocks placed, blocks destroyed, times died, days passed, total kills, kills on each creature/animal, amount of each tool made, number of things crafted, and any other things like that would be cool little things to check out every once in a while.
??? I don't really have a full thought out plan for this one, but I think there should be some sort of feeling of purpose in the game. Like ranks or levels (that probably wouldn't work and would be stupid, but just as an EXAMPLE, I know minecraft isn't an RPG) It would give the players something to work for in single player, because really, it could get very boring as soon as you build the amazing structure that you've been planning for months.
New Vehicles. I haven't really thought this one through either, but I could see it happening. There's a mod that allows you to build planes, and fly them, and it would be cool to have that type of thing in the game. I'm not saying to add cars or trucks, but maybe planes could be added, or a train that runs on coal, or even adding horses into the game and making saddles an object that you can actually make, because I've put tons of hours into minecraft and never found a dungeon, so only having saddles in there is annoying.
Tribes/Natives. I think it would be fitting for minecraft. You run into a tribe of maybe somewhere between 10-40 enemies, and you can either run in like an idiot and die, or strategically take down everyone in the town over a week or two (of in-game time.) They won't chase you all the way home, but definately passed thier village a ways. Once you clear the town out, you could search the place for treasures and other valuables and use the village as a place for you to use as well. These people won't spawn, they will only live in their villages, and once you wipe them out then they're gone (for that specific village), if your using the village, they won't spawn on you and kill you. The villages can be randomly found throughout the game in different places. (They don't have to specifically be natives/humans; just the idea is what I'm really getting at.)
New weapons. Spears could work, or maybe some other type of weapon that ISN'T a gun. The natives could be armed with spears and bows, and you could pick up the spears and use them (as well as craft them.) They could stack up, and be picked up if you miss, just like arrows. Possibly made like:
New Plants/Trees. I think some new plants besides sugarcane and wheat could be added.. They don't have to be things that need to be made (Like how wheat is made into bread, sugarcane into sugar) But it could just be crops like tomatoes or other vegetables that CAN be added into other foods, but also can be eaten raw to heal health. New Trees could also be added, like apple trees, coconut trees, banana trees, etc. You could get fruits by just hitting them off of the tree and picking them up, and if they're chopped down only 0-3/10 of the saplings dropped will be the fruit tree saplings.
Animal Farms? It should be made possible to make a new tool (maybe rope or a whip? I'm not much of a herder...)that can herd animals into a pen or farm. And there could be a chance that the animal is pregnant, which would then spawn a new animal over a period of time, you'd be able to feed the animals wheat or other foods, and if they animals are 'healthy' (As in fed well) then once you kill them they will drop more of the item that they drop. (Healthy cows could drop 3-6 leather, Healthy pigs drop more meat, etc)
Maybe whips could be made as:
  [Leather]
 [Leather] 
I think your idea about seasons would be a good idea but the leaves shouldn't disappear as that would cause to many problems with running out of wood.
I also think it should only be rain/snow that falls :biggrin.gif:
Statistics i would say no maybe make a mod for it but it just wouldn't fit with minecraft imo.
Hopefully in the future minecraft will have mini goals or quests but until then we're just gonna have to be creative :smile.gif:
New vehicles: Notch should add new things maybe a train but then we have mine-carts, so maybe just a way of linking them together? And really we could use a few more boats. And for horses i propose notch simply comes to a agreement with the maker of mo's creatures (but Notch would have to edit them to make them balanced e.g. remove the ogres or make them toggable).
The tribes/natives would be a good idea if they made pre-designed buildings and lived in them in a specific area.
New weapons is a good point and there are a few mods for the spears and for crossbows.
For new plants/trees i suggest Notch implements xie's farming mod and nandonalt's coca tree mod.
And last of all for animal farms i think it would be too easy for the player, and you could just build a mob trap.
There are quite a few mods i'd like notch to look at, tweak and then implement into the game officially and a few that i'd like notch add as optional content e.g. More creeps & weirdo's