I think to live long enough to build something strong, to know other cultures, to learn many languages, to have experiences until you get bored. Although this last point could vary since we always evolve and therefore there will always be new things to experience. In my case I am not afraid of death, I do not cling to life, I just live. I would only change the fact that it would be in good health, I think it is not nice to age to the point of being sick in a bed or wheelchair depending on your family who is with you to do your things or keep you alive in that state you are in. I think at some point in my life I will get so bored that I will want to rest or explore the unknown of death and that point of old age in those circumstances would surely be my point of boredom. For now I would say about 150 more years and in good health would be fine for me to do so many things before I start getting bored and start wanting my body and mind to shut down completely.