I can't pick one.

The Original star wars is my favorite album to listen to but, I'll just list all of my favorites.

Binary Sunset, Burning Homestead, Princess Leia's theme is a big one for me, Ben Kenobi's Death, The throne room, The Asteroid Field, Han Solo and the Princess has also always stuck with me, The imperial March obviously, Yoda's Theme, Attacking a Star Destroyer, Lando's Palace, Clash of Lightsabers, The Pit of Carcoon, The entire Battle of Endor, and Victory Celebration (Nyub Nyub)