What's amusing is that you've got quite a few moral conundrums here. For the Christians amongst you, you've taken your own life. In dying you confide yourself to hell, and for all the good you do, it will likely be the burning fires for you. Or outside of Gods grace. Whatever it is that's supposed to happen to naughty Christians.
On the other hand, is curing cancer a good thing? The last great disease of humanity, which upon its curing will lead to a population boom, virtually choking the earth under the weight of humanity, not yet ready to travel off of Holy Terra and colonise the galaxy under the Emperor... sorry, caught up in that.
Additionally, living forever will make you a sage. A liviing library. I'm an archaeologist, and what myself and my collegues would pay for a man from the past to tell us what the hell it all means. A lviing record of such things would lead to an enlightened mankind. The unparallelled knowledge held by an immortal would be stunning.
On the note of loved ones dying, you honestly think you'll not make more? How many times have you sat with that one girl and thought "she's the one", only to lose her and feel the same about another? If you have kids, yeah it'd suck immensely to see them die, but they'd live priveliged lives under the household of the Immortal, and likely be some of the smartest humans alive, thanks to your nurturing sills, perfected -like all other skills you've learned- through the course of centuries
Now I put this to you: Those of you who choose death are truly selfish, wanting your own death for a quick payoff of greatness more than the progression of humanity as a whole. You squander the greatest gift any mortal could ever recieve on your own worry that you'll be bored? The post says you can't die. Who needs to die, you can be put into dreamless sleep by future tech at the end of all things, I'm sure.
...am I looking too far into this hypothetical debate or was that Escapist standard?