If you have the choice, would you want to live till the age of 120? I believe many people will cringe at the idea of that.
Much of whether you would like to take that up would depend very much on the quality of life you have then, and how you perceived it will be in the future that you have.
In most cases, if you are a rich fella, you might want this eternal pill. If you are born in the slums, that will be more suffering.
If you have some chronic disease such as myself, you might not want to live to such an old age, where you will need to continue to pay for very expensive medication. I might even be disabled in a certain way by the the age of 50-60 and my quality of life have deteriorated drastically.
We tend to be very ......