I would go with a new game + kinda thing, where I would start life anew in a fresh body with all of my memories intact as many times as I wanted. That way when I had had enough, I could just stop, after all, what fun is life without risk or challenge? Having to start again even with all the knowledge you still have, you would still have to train that body to walk/speak again, and get it in good shape... And you could be a kid again, but have all the advantages of an old soul within to guide you and keep you from fuckin up too much... and y'know the same personality, and be you...Fuck cheat codes, I'm not even old and I can see life getting boring as fuck with the power to do anything, and I can see wanting to stop living at some point, what with all the bullshit I've dealt with, and the possibility of getting bored with this shit.
It would be awesome to have a bit more time though, and keeping your memories and being able to refresh your body like that would be nice, also, people always treat kids a lot nicer than adults, and when I was a kid I took great pleasure in proving I was smarter than a lot of the adults around me... immagine how well one could do that with an entire lifetime of experience behind you.