In terms of artistry, acting, direction, production - what do you think is the greatest movie of all time?

i loved braveheart, and the shawshank redemption , i saw the exorcist and had to sleep with the lights on for months, i was 20, have never been able to watch a real horror flick since. forrest gump, i thought was very clever, but i think in terms of production, star wars was well ahead of its time. my all time favorite movie is the green mile.i loved the story, the acting, and actually had to run from the room the first time i watched it. i was emotionally engulfed