So movies that can stand the tests of time?
Raiders of the Lost Ark - Still amazing, well written, well acted, brilliant film. I saw this when I was ten and it still gets me into the film every time.
Dances with Wolves is still incredible. Some of the shots they got in the Badlands are impressive 20+ years latter and no its still better than Goodfellas. The shots of the stream with the sun light bouncing off the water before the Blackfoot attack is very impressive cinematography and one of the reasons they won the Academy Award.
Alien and Aliens are both still awesome films. The uncut, 3 hour epic version of Aliens is amazing if you love the franchise.
Blade Runner - still the best SF story ever told and still an awesome movie. Its creepy seeing a young, real young Edward James Olmos.
Lawrence of Arabia, Dr. Zhizago and Casablanca are all amazing films which still look great and feel like big epic films.
Rio Bravo is amazing as well. Even with Dean and Ricky's song. I mean a twenty year old Angie Dickinson, hells ya! Actually anything with John Wayne is awesome still.
Good Bad & the Ugly - still holds up as does Once Upon a Time in the West.
Jaws and Close Encounters still hold up as well. I would rather watch both of those than their contemporary equivalents.
Movies that will not hold up - Avatar - script was terrible, its basically Ferngully meets Dances with Wolves, poor acting outside of S. Weaver and the 3D thing will fade leaving this movie to die like the Transformers and Iron Man.
Any James Bond film. They are great but also look hookie and from whatever period of time they came from. Especially the 1970s and 1980s Bond films.
You really just have to not listen to mainstream Hollywood and pick a few titles from the lists of Academy Award nominees past to find the gems that still work in 2012.