I would be a superhero, but more along the lines of Sinestro before they kicked him out of the Green Lantern Corps or Black Adam, essentially imposing order on people because they're basically making war on each other or taking other people as slaves. Now I admit that sounds like villain behavior, but look at how the world is run right now. Now imagine that world, but someone with unlimited power basically says "you're gonna play by my rules or I'm going to pulverize your heads into puply masses. You can worship whatever god or gods you want, you can establish any government you want, but if I hear tell of anyone making slaves of other people, subjugating or oppressing someone because of race, religious affiliation or anything like that or if I hear tell one country's government is warring with another and I know who started it, your ass is going down. I'm gonna trust you guys to play nice and behave like civilized adults. I don't want to be the heavy, but if you guys are gonna start causing trouble then you're going to be hearing from me."