shoeless
Here me out. What if there was metal bending, but the strictness of the poses was increased by 99% when bending metal. So only those who get the EXACT right pose could manipulate the object.
This is more of an easter egg/skill check than a game mechanic suggestion. It would be like having the sword in the stone. I like that there is fluidity to the poses, so definitely wouldnt want it to change the game. But long in the future its interesting to think about different kinds of earth and difficulty of bending.(...)