Run Silent, Run Deep: Clark Gable, subs... what's not to love.
Blazing Saddles: mongo just a pawn in life.
The Good, The Bad, and The Ugly: Gotta love the music and all the funny quotes.
Planet of the Apes: Just watched it with the boy, A planet where apes evolved from men!
The Empire Strikes Back: Remember when SW movies didn't suck.

Snow speeders, Boba Fett, nerf herders.
Honorable mention: monty Python HG (not on list cause everybody else mentioned it

, any spaghetti western, Any old, classic war move, pre-1970. oh yeah, Das boot directors cut. (sorry, love RSRD more)