Films Depicting "Multiple Personality Disorder"

Multiple Personality Disorder or Dissociative Identity Disorder is a severe condition in which two or more distinct identities, or personality states, are present in and alternately take control of an individual. The person also experiences memory loss that is too extensive to be explained by ordinary forgetfulness.

Which of these films depicting Multiple Personality Disorder disease and its effects on the characters moved you the most?

[Note: This poll contains spoilers.]

Discuss the list here