I don't want to take over the world, like, at all.
What I want to do is take one small functional system of society, technology, or the natural world at a time, and redesign it (or scrap it entirely and make something better to replace it). Then, I want to walk away and let someone else be the system administrator.
Then, when I run out of systems to design and improve, I want to ensure that they all integrate with one another effectively, according whatever overall vision I will have developed by then. Once all the systems are properly integrated, I want to expand to include new, interesting functions, and incorporate new discoveries as they arise. Eventually, I'll only want to deal with the problems that may/would arise from novel input, to determine whether and how they should be assimilated or discarded.