Trying to make old people live longer is one of the worst ideas I have ever heard, especially when the planet is having population control issues. New people are born, old people die, that's how it works, that's life. Scientist shouldn't be messing that up because it's a pretty good system. As people get older they get less useful until they become immobile bodies spending way too much money in medicine. My grandmother is the perfect example, she can't do anything and she is constantly taking medicine for things she has never heard of. At least she has the right mindset about it, she's waiting to pass on naturally, and I respect that. If I were to offer her a pill that would make her live even longer, she would laugh and refuse to take it. I don't know why people want to spend a ton of money on research to make people live longer, I think it's great that they are looking for cures for diseases, keep that up, but don't try to make the average life span pass 100, that's messed up.
If I could choose my life span, I would say 40 is fine by me. I don't plan on having a wife or kids so that would be perfect, however, if I do end up stuck with a family, I would at least want to live until my kids graduate college. I see old people every day, that's not the life for me. I'm not saying that every old person has a horrible life, but I just don't see the glamour in filling my body with pounds of medicine just so I can go play bingo with my pals. We live, we die, it happens.