Is Eternal Life Even Desireable?

[Iroscato]

I think the only reason eternity doesn't terrify us is that we can't wrap our heads around it. After a trillion trillion years, it will hardly have started.

Right. Our brains just aren't equipped to grapple with concepts of eternity and infinity. That's not a slight on the human brain - considering half a million years ago its main priorities were eating, fucking and shitting (though to be fair, those are still pretty high up on my list, at least) we haven't done too badly at all.
But eternity...it will never end. Not ever. You would continue to exist long after the collapse of the universe, far beyond the time when the Earth is devoured by the Sun, condemned to go on, and on, and on...forever. I struggle to think of a more horrific fate, really.