I was wandering around the Internet and I found Strange Horizons, which I am considering writing something for. On their guidelines, they had this really interesting link about sci-fi story plots:

• Stories We've Seen Too Often
• Horror Stories We've...

Some of them I have read, some of them I have hated, but I don't think I've actually created any. No... I think I had one story on the horror plot list. And I liked that story. :)