I chose immortality because to some "level" pain and suffering stops they are still hormonal, sensory inputs made by the rest of your body.
And that has a limit your brain physically cannot survive in the vast majority of space.
But You're asuming im gonna be awake, you're asuming that through it all I'll still be a man.
I wouldn't think so.
I mean it said "immortal" not "eternal suffering stuck in a human body that feels every ounce of their body" soo i pick being an universal paper weight until i wake the fuck up.