Sans Serif fonts - Sans Serif fonts are generally more informal, more modern and more 'friendly'
On this poster of the movie Pearl Harbor we can see that the Palatino text is very regimental and high standing, reflecting the social class of the main characters of the film. The text is also very old fashioned, telling us of the time period the film is set in. This font is a San Serif and as mentioned , are more formal.
On this poster of the movie Rocky we can see that the text Franklin Gothic Heavy is used which is very big and bold mirroring the boxer Rocky, it punches at its audience. Also this type of text is very informal as it is a Sans Serif telling us of the people in the film, that they come from a working class/poor background.