Tenney's movie Witchtrap was partially filmed in Fairfield, California,
where he and his family moved after his father retired from the U.S. Air Force. Before that, his family had been stationed in Hawaii, Bermuda, and various areas of Northern California. He attended three separate grade schools, two separate middle schools, and two separate high schools before moving to Los Angeles to attend U.S.C. film school. Tenney's father was stationed in Saigon, Viet Nam during the Tet Offensive.
I think the answer could work for any genre: a good story. Bottom line. Your audience will forgive everything else. They will forgive you if the acting isn't up to par or if the lighting isn't up to snuff. But the worse your story is, the more perfect everything else has to be to make up for it.