Blade Runner - Favorite film of all time.

Raiders Of The Lost Ark

Indiana Jones and the Temple Of Doom

Indiana Jones and the Last Crusade

Back To The Future

Planes, Trains, And Automobiles

The Empire Strikes Back

Pee-Wee's Big Adventure

Field Of Dreams

Batman

Honorable Mention - The Breakfast Club. I'm a huge fan of films that take place primarily in a single location - Rear Window, Alien, last half of Jaws, The Big Kahuna, etc. It takes a strong story and great character interaction, but when it's done well, it's a very interesting experience.