Common Minecraft is a little, u know boring they should add more things to it!
-Birds-
Reason: Minecraft doesn't have anything flying except for an Enderdragon which you can only kill one time in 1 world...The bat... those are only found in caves and they are slow..
What kind?: Probably very common ones like one in most places around the world like the most common bird.
-Sea Animals-
Reason: There is no PHYSICAL sea animal in minecraft. The fish is just a sprite/item...
What Kind?: Common fish, Schools of fish (It means fish that go together) like what they put in the TROPICAL PARADISE MOD.
-Rainbows-
Reason: Not to be G*Y but, common minecraft ain't real. It would be cool like after it rains a rainbow just shows up and at one of the ends of the rainbow there would be like a pot of gold... but it would dissapear like in a few minutes so you have to hurry up. Or just add it as an affect and it does nothing.
-Beach-
Reason: A beach... like with different kinds of trees like coconut trees or palm trees or something. That would be nice for once. Relax for once.
-Lens Flare-
Reason: It'll make the sun look a little better. They should also brighten the sun with this. Of course, not everyone has an awesome computer with like 16GB RAM or like intel i7 so there should be a setting for this.
-Sonic Ethers EVERYTHING-
Reason: Realistic epic looking water, shadows...common shadows shadows. Minecraft needs shadows. Of course again. Not everyone has an epic computer like Alienware with that 8GB RAM, intel core i7 (drooling right now) Huh oh uh excuse me off topic. This should be a setting called like "Realistic Setting" and it would say at the bottom in red "Only use if you have a good video card or Ram or something idk.
-FEW TWEAKS-
Reason: Arrows stick on to mobs if you shoot at them? that will be nice. Common even though this isnt very BIG it will make the game a little better. There should be a sound for HITTING MOBS (except for skeleton they just added that) I'm not talking about what they cry when they get hit like the matmos mod. Everytime you hit a mob or swing ur sword it's like "Woosh"