What about "death"?

[buritobr]

Eternal life could be very boring.

When I miss someone I love, I miss this person because she is not with me. But when I pass away too and see her again in the other dimension forever, I might become tired to see her.
Some people might desire to live forever in order to see the evolution of the mankind in the far future. But when the mankind become extinct? When the Earth cease to exist? When the sun cease to exist? Specially after these events, eternal life would become really boring.

And what about the reincarnation, instead the monotheistic view of heaven?
Becoming a baby again, learning how to walk, how to speak, how to eat again, going to school again would become very boring.