These are commands I think Mojang should add to Minecraft.

/saddle -Type command while pointing at a pig, add it will gain a saddle.

/ore [ore] -Point at or hold stone and it will turn into the specifed ore.

/bonemeal -If looking at something that can be Bonemealed, it will be bonemealed.

/mushroom -If looking at a cow, it will become a mooshroom. If pointing at grass, it will become Mycelium.

/dye [dye] -If holding/ looking at wool or looking at a sheep, it will dye that color.

/dimesion [dimesion] -Teleported to specified dimension.

Numbers for Dimensions:

0 = Overworld

1 = Nether

2 = End