There is no one else I would like to be. I'm content with being me.
There are some fictional worlds I'd like to enter for a time, but there are no one in particular I'd like to be there, I just wanna experience that world, and be happy to be there as myself. I'd love to live in the worlds of Pokemon and Rune Factory, and maybe Dragon Quest.
I can't say for how long, it would depend on how I liked it there and whether my loved ones would come along.
I would love to become someone who volunteers or work at Turtle Hospital, and become them when they enter the facility and be the one to handle the turtles, but I have no wish to stay them in any non-turtle related time.The same for someone working at a turtle/tortoise sanctuary.
I would also like to temporarily become one of the people working at the wolf center I'm following so I'd be the one to feed and pet the wolves and otherwise be around them and hear them howl IRL and all the other sounds wolves make when they interact. As in the above I would only want to get the wolf experience.
Better yet would be to be able to be there as me, but that's not likely to happen, so I wouldn't mind taking their place for some minutes or hours a day.