To say the original Star Wars (that is, Episode IV: A New Hope) is iconic is to say that the sky is blue. But as a kid swept up by its bold newness, two things always really captivated me most: the stellar (ha!) soundtrack by John Williams and the vivid sound world created by legendary sound designer Ben Burtt.
(Seriously, have you never wondered how, exactly, that great blaster sound was made in 1977? Or that TIE Fighter screech?)