Mise-en-scene is most important to me. Growing up Andre Bazin, James Agee & Andrew Sarris were all the film journalists who taught me how to love & appreciate cinema. So when I watch a film and analyze it or discuss it in depth, obviously camera movments, composition, lighting, depth and movement within the frame are all most to me. Storytelling is also important, depending on the type of film it is (for a Hollywood film, but when I watch a Kiarostami, Bresson, or Angeloplous I am interested for things other than quality of storytelling & forward-momentum narrative).