Why not?
I think it's a good idea for a few reasons. Mainly, that death is bad in the abstract, since there is no afterlife and it is the end of experience and thus happiness; and bad for me personally, since I don't think there is an afterlife and I want to continue to experience happiness. There is also the associated grief from those who loved the departed, and the decrepitude of age that makes life not worth living for some.
The only aspect of immortality I don't like is the population problem, and I have no reply for that; but I'm mainly concerned with those who oppose it on ideological grounds - like those who might say "death gives meaning to life". To which I say: what meaning? Are your experiences enhanced by the looming prospect of you and everyone you love ceasing to exist forever - or does this provide sadness and anxiety? For almost everyone, it is the latter. My life would seem even more* worthwhile if I did not have a mere ~76 years.
*(Even if you are religious, there is a chance you are wrong, so this is still a distinct possibility.)
To use an example of Eliezer's, if the benefit of death is so much greater than that of immortality, would an immortal want to die? Probably not, unless they were tired of life. And that, I can understand; when I say immortality, I really mean the ability to choose when you die. I object not to dying when one wishes to, if one ever does, but to the dying being forced upon us, with no concern for our desires. So the question becomes, would an immortal want to be subject to an arbitrary death date? I cannot imagine this ever being the case.
Of course, if you are a theist, then this argument would become about the afterlife. I would certainly question a God who sets up a system like this universe, but that's a different debate.
The only aspect of immortality I don't like is the population problem, and I have no reply for that
I used to worry a lot about overpopulation, but not so much anymore. We don't have an overpopulation problem, we have a resource overconsumption problem. This is most likely easier to engineer around than death is; it's not like we haven't jacked up the human carrying capacity of the earth several times already.
I was immensely glad to find this community, because while I knew intellectually that I was not the only person who felt that rationality was important, death was bad, and technology was our savior, I had never met anyone else who did. I thus determined my career without much input from anything except my own interests; which is not so bad, of course, but I have realized that I might benefit from advice from like-minded people.
Specifically, I would like to know what LessWrong thinks I should do in order to get into "immortality research." Edit: that means "what field should I go into if I want humanity to have extended lifespans as soon as possible?"
I feel immortality, or at least life-extension, is one of - if not the - most important thing(s) humanity can accomplish right now. I don't think I am suited to AI work, however. Another obvious option is an MD, but that's not in my temperament either. My major right now is biochemistry, in preparation for a doctorate in either biochemistry itself, or pharmacology.
I think there's a good chance that advances in this area could contribute to life extension; aging is a biochemical process, right? And certainly drugs will be involved in life extension. But is this the best place to apply my efforts? I have considered that biogerontology (http://en.wikipedia.org/wiki/Gerontology) might be better, as it is about aging specifically; but I don't know much about the field - only that Wikipedia says it is new and very few universities offer degrees in it. My final idea is nanotechnology of some kind; I believe nanomachines may be able to repair our bodies. I'm not sure what type of nanotechnology I'd be looking at for this, or if degrees in it are offered.
Any ideas, suggestions, or comments in general are welcome. I favor the biochemical approach as of now, but only through temperament. As far as I know, AI, biochemical/pharmacological methods, and nanotechnology are all about equally close to giving us immortality. If someone feels one option is better than the others, or has recommended reading on the subject, please share!
Thanks in advance, my new rational friends.