let's see, most recently it was Man of Steel twice, different friends wanted to go see it on different days, and I enjoyed it both times, I don't always get the opportunity so it's nice when I do,
Captain America was also twice, as was Wreck-it Ralph, also Avatar and The Other Guys
as a kid I can remember going to see Hercules at least twice, and the Phantom Menace at least 5 times (I was 6)
The Lord Of The Rings: The Two Towers twice
The Return of The King three times
I saw Revenge of the Sith twice
Hsrry Potter snd the Deathly Hallows part 2 3 times (different friends and the 3rd time was for the free poster which I gave to my sister as a present)
the Lion King in 3D twice (I love that movie, and the soundtrack on those speakers, 'nuff said)
that's all I can think of right now, I'm sure there are more