Well, for me it was Star Wars. Saw it 11 times when it was initially released in 1977. I was just absolutely floored with the visiuals. I think second place would have to go to Back to The Future, my oldest son was a kid when it premeired and I think I took him to see it 5 times. I remember him sitting on my lap, point at the screen going "Future, Daddy, Future......" with a big smile..
Most movies, If I really like them, I'll go see twice at the movie complex. The second time is to look for details or subtle beats that I missed on the first viewing. I find seeing the movie a second time is more enjoyable. You're able to enjoy the whole movie and not have to worry about what is happening or keeping up with what's actually going on.
Q2UnME