The amount of inside jokes me and my friends have about these movies.

The BAness of Han never gets old.

The cheesy-over-the-top farmboy esque Luke doesn't get old.

Vader's chilling breathing never get old.

The trench-run never gets old.

The asteroid scene never gets old.

"It's a trap!" never gets old.

X-wings never get old, and neither does the Millenium Falcon.

The walking carpet never gets old.

"Laugh it up, fuzzball" never gets old.

"Scruffy looking nerf-herder" never gets old.

Snowspeeders tripping AT-ATs never gets old.

My consensus: these movies NEVER get old!

:)