I luv this movie and don't remeber how many times I've seen it..may be 50 times or so...

12 Angry men (the original Hendry Ford Version)
Goodfellas
Citizen kane
Rashoman
A few good men
Dr. Strangelove
And there are couple of tamil movies...there is one (Mudhal Mariyadhai) which I would have seen more than 100 times and still love to see it...