Recently, a couple of other geeks and I (yes, I'm a geek, I've accepted it and am proud of it) banded together to do the rarely-attempted movie viewing trial of a lifetime. That's right, we watched all six of the movies, back to back, in chronological order. The way George Lucas envisioned them, and the way few really experience them.
And I've learned some things from it. First of all, if you're a new viewer, HEED THIS WARNING. You will enjoy the STAR WARS Saga immensely more if you begin with Episode IV-- A New Hope. There are great, classic moments which will only be ruined if watched in chronological order, or their significance will be lost, at least. And the original does the best job of introducing the viewer to the overarching story, in medias res.