The Decision to Croak.

[Lalwendë]

and it came to pass for her as Elrond foretold that she would not leave the world until she had lost all for which she made her choice

That's an odd quote. We might assume that she would have left then, once her own children had aged and died, but her son (and daughters?) were still alive when she left for Lorien and death - as they too would be what she had made her choice for. Although in any case, she would have to decide to leave them behind, just as Aragorn had to. That, I would guess, is one of the hardest aspects of having to choose when to die - the knowledge that you will have to say goodbye to your family.