Well, I enjoy eating healthy. It's bland, maybe, but the occasional treat is allowed. So, I can do what I enjoy and live to be 100. I don't want to though. Mid-30's would be good for me. I think life would get boring by then. It all depends on whether I decide on a child or not. Though, I wouldn't say anyone should follow some path to being 90-100 if they're going to be unhappy for half that duration. That's just forcing yourself to be miserable.