I would gladly give up procreation for immortality, but I'm not sure i would want eternal life, just really long life.
A billion years or so should probably be good, but a trillion? Maybe. But when you truly think about the sheer scale of eternity i feel release from consciousness would be a welcome thing.
Most humans don't live to be 100, but just for argument's sake I'll declare that the average lifespan. 100 = 1010
Anyone with a basic understanding of math will know that 10n is a 1 with n zeros on the end, so 1010 = 10,000,000,000 or ten billion. That's 100,000,000 or one hundred million lifetimes already.
This is an amount of time that would be incomprehensible, but it is only just the beginning.
Imagine 101010. That's 1010,000,000,000 or a 1 with ten billion zeros following it. Getting pretty massive, huh? The number that represents is so large i could not even represent it here.
But it only gets more massive, imagine 10101010 or 1010101010
What about 10101010101010101010
These are numbers beyond all human comprehension, i can not even begin to wrap my head around their approximate magnitude, and yet these are nothing compared to eternity. Eternity just goes on, and on, and on, and on, and on, and on, and on, and on, and on, and on, and on, and on, and on, and on, and on, and on, and on, and on, and on, and on, and on, and on, and on, and on ...
Even assuming the universe isn't eternal, that's still far more time than i would know what to do with. But still, as long as suicide is an option, i would just keep going until i crave the nothingness.