World domination, since I get more out of it... presuming in this scenario I will not be assassinated or something. I'm not entirely sure I'd want to dominate the entire world, though... a developing country would more than suffice, as I might actually be able to improve conditions in the country (as well as my own)...
But if I were the globe's unquestioned ruler, what's to say that society wouldn't crumble? I don't think I have the capacity to sustain the entire world, even if I rule it ruthlessly with millions of devoted followers.