It would depend on what immortality really meant. That is to say I'm aging and slowing down both mentally and physically. If this went on indefinitely, an eternity of it would be hell. Wait, take that back, an eternity of just about anything might be really, really bad. Can I live eternally until I don't want to anymore? That would be perfect.
But if I must choose a natural death or an uncertain but unendable eternity, I'd choose a natural death.
But if I must choose a natural death or an uncertain but unendable eternity, I'd choose a natural death.
If there is a god, I want to believe that there is a god. If there is not a god, I want to believe that there is no god.