The first one is so simple...yet compelling. There is a story here...but I don't know the beginning, middle nor the end. I think it's because we can see only the hand...to whom does it belong? Where is he/she going? Why are they in the big, black car? Just enough detail to pique my curiosity and set my mind to wandering and wondering. Nicely done.
I also like the fourth. Mainly due to the facial expressions of our heroine and hero. She stoically takes a self-portrait. For what purpose? Why does she not smile? And he is probably wondering the same thing. He almost seems disappointed in her lack of enthusiasm.
I enjoy photographs like these that draw you in with their simplicity and get the brain juices churning with back-stories and motives and dreams.