You'd inevitably end up completely isolated in a changing society you can never hope to understand, watch your fellow man-things evolve into weird creatures, and have it culminate with you floating in an endless void after slowly watching every light source in the universe go out, one by one.
Sure, the lead up to all of those things would be somewhat enjoyable (minus the constant emotional scarring from death and other things), but the end is essentially death anyway. Except your conscious for all nothing happening.
Honestly, the concept of eternity as a whole frightens me more than death.











