exquisite optical quality and character, and for others by being smaller, lighter and neater. A fixed focal length forces you to think more about the composition, and to use your feet to change it. Indeed, with all the other things going on in a shooting situation, you might even find that tweaking the focal length with a zoom ring is a choice too far.
Zoom lenses actually demand more attention from the photographer than prime lenses, because turning the zoom ring doesn’t just change the angle of view (see page 71), it also alters the style of the image. Some people find that challenge stimulating, but it’s a necessary consideration.