Eve Arnold
[Photographer, b. 1913, Philadelphia, Pennsylvania, d. 2011, London.]
What drove me and kept me going over the decades? If I had to use a single word, it would be “curiosity.” 
A studio session... provides the greatest chance for control. [But] even though there is total freedom, I still dislike studio photography and the contrived images that usually stem from this genre. Lesson number one, pay attention to the intrusion of the camera. My passport was my camera.