Time travel.
I just had this weird moment wherein I was laying out the plot for a short story that I was writing ten years ago.
It's a time travel story.
I still have just about the whole thing in my brain, including the rules that I set for the time travel narrative.
I was asked why I didn't finish it.
All I could come up with was my ex telling me that it was cliche.
The thing is, I immediately asked her to name another story that handled time travel the way that my story did, and she couldn't; but, I guess I let her get into my head nonetheless.
The computer on which my drafts were stored was destroyed, too.
Still, no excuses. I should have, and still should finally pound out that story.