Stop aging. Immunity to disease if possible too.
I am actully content with my lifespan, 80-90 years is long enough for me to grace this earth
Having a fit body would be cool Staying healthy and still be able to move like a leaf while having a old body wouldn't bother me THAT much mehehehehehehehe
yea I saw that vid makes me think there might be a reason to live past 50 now
I think Mirai Nikki is a good lesson as to why living forever isn't fun lol