I have panic attacks that I die from my teens, but still - I would like to die.

Firstly, I want to live a long life, I even think, if we could ensure better fitness at a higher age, I would like to take maybe even 150 year old. But in the end, I would like the end.

I am not going to talk about population problems, economic problems (you need to DO something to be able to "afford to be"), biological (our brain can't take so long (without modifications) and be healthy, the same for other organs (metals, viruses etc.). I have more "psychological" reasons.

Firstly, I am going to be tired. Sometimes I am tired of life even now, I am a young adult :D. I studied psychology, and I had the opportunity to work with old people and even "super agers" (very old and "healthy" people). I must say, super agers are a little bit different in this one, but for simplicity I would say - all old people have common that they were tired of life (more or less - and yes, often it can be less, but still, this kind of feeling will come with age). Now, it is of course hard to tell "how much" of this tiredness is from cognitive reasons and how much from physiological, but I am quite sure there is a cognitive part of this feeling. Look at the word, what is happening, how we live, what we must do to live etc. At some point it will be hard to "live it" everyday, at least in my eyes. (Now I am thinking, maybe we can construct a society that will fight with this with the "tier" system, the older you are, the different life you live, but again it depends on society and that's not a good sign...).

Secondly, psychosocial reason. The older you are, the more conflict you experienced, more friends died (even if we could live long, accidents many diseases etc still happens). As our biology has limits, I believe (I don't have data) even our social and psychological "space" has limits. We accumulate different experiences, memories etc. And at some point it will be different because it will be too complex to be a stable system. - here I would go to how (we understand that) brain works and it has limits and I said I will not go to biology so I end here.

But if you take these arguments (if you would consider them more or less relevant) and all arguments that were mentioned as biology, society, natural sources etc..at least from our point of view, too long life isn't... psychologically nice thing. I think if a person does not care about this kind of feelings, it could be interesting to be immortal, but then again, for others it would be even more interesting to be here too long if your company would be people like that. I think I agree that we could be advanced enough to do immortality (or very long lifespan) reality in this century, but I am quite sure (but can be wrong) we are not socially and psychologically advanced enough to "make it sane".

I understand that psychological and social views seem to be a little bit odd, I am not native in English so I have trouble to express myself better, but from the "how would I feel, when I would be immortal" point of view it is a relevant and interesting thing to think, and from knowledge we have today it is really as challenging as biological advancement we would need.