If TexPhoto's comments aren't enough, I'll share my own personal revelation: that travelling with just one or two prime lenses makes it much simple for me to compose shots in my head, and to quickly identify a good composition, before the camera has even left the bag. Basically, my mind's eye starts "seeing" like the lens, and ultimately I get better shots because of it. When I used to carry around 6+ lenses, I was always wasting time switching back and forth, as if when later reviewing the photos, I'm going to notice any difference between a 35mm and 28mm composition.