What Movie Do You Have to See on the Big Screen?

The Tree of Life

The question for this week's Criticwire survey (which I participated in) went as follows:

What movie does every film lover need to see at least once on the big screen before they die?

I'm afraid my answer feels fairly lame compared to the others, but I could only pick from movies I've actually seen on the big screen, couldn't I? Yes, 2001, Lawrence of Arabia, North by Northwest, and  Playtime are all better answers, but I haven't personally seen them on anything but my TV set. Maybe in time I'll have a better answer to give.

PS: As a side note, my favorite answer by far is Calum Marsh's.