What happens when humans figure out immortality, but you can’t get younger and you can’t have kids afterward?
No, really. A lot of immortality schemes involve eternal youth, but as Tithonus discovered, that’s not always how it works. Fictional immortality often frustrates me because characters sticking around forever unchanging isn’t nearly as interesting as characters doing just about anything else.
What tropes frustrate you? Do you find yourself questioning soulmates and true love? Do you roll your eyes at the thought of a band of teenagers bringing down society? When the hero beams down from orbit, do you snark about the continuity of identity? Write a story where something goes wrong or unexpectedly, terribly right.