Absolutely hands down gravity. It has so many applications and abilities, like flying. More than that though it's insanely powerful (arguably the most powerful element in canon) and would have infinite scientific uses. Gravity really does hurt, so having some level of control over it would both practically and symbolically be liberating.
When I look around at the things inhabiting this Earth, the one common thread is that they all exist around and under the influence of gravity. All of human history has been about defying gravity, reaching the stars, and breaking the gravatic norm. To have control over gravity would be a hundred thousand leaps forward in human progress, as well as the satisfaction of my personal desire to be more than my nature. To exist beyond the gravatic norm designed for my being would be the next step for my individual. I could roam across the universe, creating on magnitudes greater than I ever could. I'd create sculptures out of asteroids and master the third dimension.
The thing a lot of people don't completely understand is that power is the ability to move (mentally and physically) and alter. The other elements are incredibly effective, but gravity is about movement. It defines in a huge way how we understand interaction and how objects co-exist.
So uh, yeah gravity lol.
Edited by Banana Gunz, Apr 12 2018 - 08:29 AM.