haven't read all of the posts - but......
To be immortal and vulnerable to harm!?
That sound like that story "the monkey's paw" or something like that.
To have an immortal body and repeatedly loose the people you love, generation after generation would be hell.
To see you children die again and again, or decide not to have any although you may want them desperately, just so you wouldn't have to subject yourself to their death would be hell.
To live in fear of how you may hurt yourself, and have to live with it forever.
Medical miracles aside, you would eventually end up as a head and torso, crushed and covered with scars.
It's just too horrible to think about this anymore -