My Minedea is:

Player, block, and mob animation.

It would be cool (if it would not create TOO much lag) to have the player have various animations, for example. If the player stands still, the arms slightly move and the player blinks [mobs aswell :S] and when the player moves, the head slightly turns from side to side and the walking animation makes the legs bend like in real life. And when the player is running, the legs bend quicker, and go back and forth quickly giving the running aspect more of a realistic feeling.

For the block animations, if you are in the process of breaking the block. small particles dust off the block, (small pixels, not the big pixel things) and it looks as if the block is slowly shrinking down till it is small, then gone. Like in real life, if you were to brake some grass. You would dig it, and it would go down, instead of cracks appearing and then it going POOF. Once the block brakes, it would be cool if instead of picking up the block, it looks like you are picking up lumps of the block, as if the block shattered and truly broken, and once you pick it up, the block becomes whole(ish) in your inventory.

The mobs:
ALL MOBS EYES BLINK

Cows: When they moo their mouths open, and grass falls out of it.

Pigs: When they oink, their eyes close, during the "oinking' process"

Chickens: When they move their heads bob forward and backwards, and when they cluck, they blink and their beaks slightly open, and their head kind of "expands and contrasts" [or as some would say "their heads throb"]

Sheep: They waddle around with their little feet and when they go Baa, their mouths open and close

Squid: They expand and contrast, they travel around the water MUCH quicker but in shorter intervals. FOR EXAMPLE: *short swim to the left* *short swim to the right* *LONG SWIM FORWARD AND stop* *turns around* *swims slowly forward, stops and then...BOOM SWIMS FAST TO YO' FACE*

Wolf: When they bark, their mouths open and closes, and reveals their sharp teeth

Creepers: When they are about to explode, their face turns more angry, and angry...and angrier.......and ANGRIER...AND BOOM (oh and maybe the creepers turn reddish at the brink of exploding)

Enderman: They walk slower, their legs have realistic walking animations, and their heads turn really fast (NOT TOO FAST) and it looks like they quickly analyseing their surroundings by moving their heads quickly

Spider: Their legs move slowly and in a creepy manner, and the spider legs have joints so they be tapping around yo grass land [some people might hate this idea, spiders are creepy enough without vile legs tapping around and trodding on yo' grass-land]

Skeleton: Thinner arms and body structure, (not too thin) and joints in the body [CREEPYYY]

Slimes and magma cubes: Their bodies go all jelly mode when they jump, move around and stand still and when approached they try to back away and their body goes extreme bloopity ploppity shaky wavy mode

Ghast: Their leg things go all ploppity bloopity ploopity and flab around like "bi%^& IM FABOULUUUS"

Zombies: Their heads wave around as if the neck is missing bones, and their arms and body is thinner, as well as when they walk, the legs look more like "zombie movement" where one leg goes first, and drags the second lag with it,or the zombie over-all goes slowly.

I hope you enjoyed my mindeas C: