We can't have it all. I was just limiting myself to one power. What's the fun in being ALL powerful? The sky? Meh. You could destroy airplanes, and make tornadoes and hurricanes, and the like, but that won't help my personal gain much.
How about the power to fly? Do all your powers have to be to destroy, but not to create?
The sea? That would be interesting. More as a fun power.
The power of creation, of control.
But controlling the ground would be amazing. You could go places with the riches you'd get :P.