in this order, i would be in the pokemon world (really how badass would it to be able to catch all these things and have them do your bidding?)
then star wars, as fuckin force powers and lightsabers and infinite amount of worlds would be sweet as hell
then i would be in a final fantasy world, as in most of the stories i really like and being able to grind and level up like a beast would be sickkk, i would ultima weapon the shit out of everything