I would think that it would make a terrible super-yacht. The interior would have to be completely redone, and I think the average fuel consumption for a non-nuclear powered aircraft carrier is ~ 6 inches/gallon.
The only appeal of an aircraft carrier from a usability perspective is it's intended purpose of landing aircraft (otherwise you'd be much better off with a cruiser); so unless you are planning on landing aircraft (and have both the necessary crew and an aircraft capable of a carrier landing), it's sort of silly.