The Lusetti Family, Luzzara, Italy-Paul Strand I like the constant rough texture. Each subject adds to the consistent rhythm. The distribution of light and dark areas encourages specific movement by the viewer.
From the El - I like the perspective/form of this image. The pattern of the windows in the buildings adds detail to the image and the lines of the buildings act as leading lines to move your eyes around the picture.
"Power house mechanic working on steam pump" By Lewis Hine, 1920 National Archives and Records Administration, Records of the Work Projects Administration [VENDOR # Colorized from black and white photo by Larry Kemp