To me, immortality is a frightening concept. The inability to die prevents the closure of one's life; it destroys utterly any purpose of life. With an infinite amount of time to exhaust, one could conceivably do everything an infinite number of times. If all possibilities were to be exhausted, one's life would be entirely devoid of anything stimulating.

It's at this last point that I start to really think way too hard about the whole issue. Once you are dead, nothing reaches you; nothing is perceived, and no stimulation occurs. If nothing stimulated you in your state of immortality, would you really be alive, or merely another corpse like everyone else?