I wrote a new story the other day, completely unrelated to my serial project. It's just a bit of flash, something I wrote almost entirely on notecards as I was walking around. There was a discussion on a writers' forum about dramatic monologues, so I decided to give one a try (not the first one I've done, now that I think of it, since I did one that's similar in some ways about a year and a half ago--but that one was more whimsical and light than this one).
When I think of dramatic monologues, I think of Browning's "My Last Duchess," so that was my jumping off point. I ended up with a genocidal psychopath who appreciates the art of all the peoples he's destroyed. But then when I looked back at it...I had this vague sense that I'd read something similar before. Or maybe just read a review for a similar story. I'm not worried if it's just vaguely similar to something else, but with how short it is, I'd be a bit worried if the central conceit of the character revealing his past atrocities while showing off an art collection is the same as something else.
Ring any bells?