I would be The Hatmaster!
My powers would all be tied to my various hats, including my Top Hat, which makes me bullet proof, my Fedora, which makes me incredibly strong, my Trilby, which would make me very nimble and agile, and my Bowler, which would make me fade into the background, and become indistinguishable from the people around me.
I would have a horde of minons, all wearing berets, whom I would call Hattites.
My master plan would be very obvious: TO TAKE OVER THE WORLD. Of course, I wouldn't rule it all. I'd split it up, so that all my friends got to rule over different parts of the globe, whilst I got my home country of England. I would stay there, drinking tea and playing games, occasionally doing the odd ruler-y thing, and occasionally deciding to do something puppy-kickingly evil. Like kicking a sack full of puppies and orphans into a river.