Elrond or Elros?

[Galadriel55]

Originally Posted by xMellrynxMaidenx

Having thought about this it has changed my perspective on the longevity of the Elven race; I don't know what side to choose now! Either side has its own ups and downs to take into account.

That's why this is such an interesting question!
I'll still go for mortality, though. You could also have children, and learn how to use weapons, etc. You just have less time. I think that the significance of humans leaving the world means that they finish their task there. Even if the task itself remains unfinished, the part/role the person plays is complete. Once Men die, they are not connected to the world anymore. Elves never leave the world, even when they die. Their job is never finished/completed fully, no matter how many different things they do (make, destroy, change, learn, etc).