For some reason my friends gave me the nickname 'Emperor'. Anyways, can't say what grand powers id like to have as I WANT THEM ALL! *laughs maniacally*
Ahem. But a pretty useful power (which would only benefit me) would be to create doors which open up into any place i want. On a mundane level, I could go to work a few seconds before i'm due in. Or better, create a bank vault door!
I know I could just say teleportation. But what happens if someone sees you appear out of thin air? But anyway, walking through a door in my bedroom that connects to somewhere else like a beach hut in the caribbean seems to me, more subtle and stylish.