I suppose one of my motives for wanting immortality is that I do not have any religious or spiritual faith, and believe that there is no life after death. An afterlife just cannot exist, in my opinion. A loss of consciousness, the brain dies, and we, as in our personalities, are gone for good. I happen to enjoy consciousness, so I want to live forever. I'm also very curious to see if we'll ever reach a limit with technology and science, and if so.. where will it end? I want to explore the universe and enjoy taking me sweet ass time doing whatever I want.
Eternal health, youth (mid-20's-30's). I must have it.
Invulnerability seems unrealistic. It would be tricky to try and heal from a head-shot, when your brain is scrambled, possibly costing you your memories and personality, even if you somehow healed... but as was previously posted: Nano-machines might someday help our healing and more.
How about backing up your mind to a super computer and having nano-machines copy the data into your brain after repairing it?
It would be interesting to take a peak into the future. How can we know if we're being completely unrealistic or not, when we have no idea what will be possible a hundred years from now? The internet is a fairly recent invention compared to something like the light bulb, and in the time where light bulbs were new, ideas like the internet would probably have been seen as a bit crazy/impossible.
I need to become immortal. I don't want to die; I enjoy he beauty of death daily when I wash my hair and when I clean my fingernails. That's good enough for me. Living forever is much more appealing to me than having more death to appreciate.