In the play and film 12 Angry Men, the Romantic qualities of individualism and the will to go against the larger community are very well portrayed. While the film isn't necessarily designed to show these characteristics, they are shown throught the main character, Juror 8.
The premise for the film is the story of a jury deliberating over the guilt or innoncence of a boy accused of murdering his father. At the beginning of the meeting, all of the jurors except number 8 vote not-guilty in an effort to hurry along the decision so that they all can leave.
Juror 8 shows his will to face the community by refusing to change his vote. He feels that there is not sufficent evidence to conclude that the boy is guilty without at least discussing it. He faces the anger from the other eleven jurors who just wish to get on with their lives and get out of that room.
This will to fight the community is a Romantic quality. Romanticism emphasizes going against tradition and going against what everyone else thinks. Juror 8 does just that, but with better results than many who have tried.