in writing a story, there are two requirements for the subject matter.
1) you must be able to imagine it for yourself
2) you must be able to describe it for others
surprisingly few thigns fit both qualifications
np: U2 - Mysterious Ways
I jump right over the writing part and into winning the Pulitzer Prize and going on a speaking tour. Not to mention my appearance of Oprah for her Book of the Month thingy :)
I have lots of stories, lots of plots, but as Stephen Crane who wrote that truly bad novel Red Badge of Courage said, "I don't have the words."