I'd work in a Tales game. The first thing I'd do is hiring the Suikoden 2 writer to get a very compelling story, and I would make the game cel-shaded like Tales of Vesperia, with a traditional world map instead of those sh**tty ugly fields that the latest Tales games have had. Also, I'd hire Go Shiina to compose the soundtrack.
Also, I'd love to make a Paper Mario game.