Same reason why the original Star Wars movies were WAAAAY better than the prequel trilogy. They actually made things, props, animatronics. Stuff you could touch and look at and interact with. Actually seeing a giant T-rex staring at you is nothing like staring at a cardboard cutout or a tennis ball on a stick.
Infographic: How The Millennium Falcon Fits In To STAR WARS
Beginning life as a humble Corellian freighter, the Millennium Falcon has a storied history. Instrumental in the Galatic Civil War, this legendary vessel has reshaped the galaxy. Here's how the Falcon fits into the Star Wars mythos.
This is my favourite from the first three Star Wars films made. It really gets into some pretty deep areas, psychologically. The father-son relationship here is critical of course, and what fascinates me most about this film.