This is just what I really long for, and it's not only about gender which is still a big part of it.
As long as we're going to throw realism out the window, here is what I would do today if it were possible. Actually, I would've done it last year when the incident took place. I read in the news about a teen girl who murdered a neighbor girl for fun. So rather than let the body rot in prison (which is deserved in the real world), I would tell her she doesn't deserve to be a girl anymore and take possession of her body. Her soul could become a restless spirit or be banished somewhere. I know this raises a question about wanting or taking a body that shed blood, but it isn't like this is really possible anyway.