Blueheart and Knickknack, I see your points about leaving behind loved ones for whom you feel responsibility, and right now I would be devastated to leave behind my 18 and 12 year olds...it is a heartbreaking thought.
I also see it from the standpoint of our souls. From the time of our lifeplan, those with whom we intend to incarnate and in whatever capacity or role we intend to play for each other, we all have an understanding of the potential and possibility for shortened lifetimes, human tragedies and other events for which we came here to experience...some events more highly probable than others.
I take immense solace in the knowledge that those I love while incarnate are, on the other side, always with me, loved forever, and loved incredibly deeper than we can possibly imagine. This assuages my fear of death and enables me to deal with the incarnate loss...after all, its not the death which is traumatic, but rather the blinding pain of loss for the remainder of that life.
Along the same line, but sideways, I was told that we are spiritually responsible WITH our children, and while incarnate, we are only responsible FOR our children during their minority. It is our incarnate duty to give them the tools and skills to enable them to properly navigate this incarnate lifetime, and after that they have their own lifepaths to follow, just as we have. They may be inexperienced humans, but they are very experienced souls.