You always want to come back with an image that's interesting visually, and you hope to get something from the person you photograph that's different than other images you know of these people.
In 1979, I moved to England and photographed Joy Division and Bowie and Beefheart. At that time I got images that I felt had that special, well - power is a big word to say - more like intimacy and ambition that outlasted the photo shoot. I felt that they would have a longer life.