I had thought about this back in school. I would look at a really nice looking girl that had everything going for her, and wish I could just trade places with her.
Sadly, that would mean her life would be cursed to go through all the crap I have. I never would have learned many of the skills I have, and (instead) would have learned different ones.
Another difference: instead of never having kids, I would likely be a grandmother spoiling my grandkids now.
But, you would really have to feel sorry for the girl who switched bodies with me.