The Force Theme is the only theme of Star Wars (other than the Main Title of course), to appear in every single movie. Personally, it is my favorite motif out of every John Williams piece. The motif can portray so many different types of emotions and feelings, solely based on the smallest fluctuations and variations between dynamics, instruments, and key signatures (i.e. Binary Sunset vs. Burning Homestead vs. The Battle of Yavin).