New photographers, particularly in the digital era, obsess over camera bodies. Bodies are important, to be sure, but they get the lion’s share of marketing attention because they are more or less the same, except for features. Lenses are more important to the quality of your photos. (Vision and imagination are more important than either lenses or bodies, but I’m going to stick to subjects with which I have personal experience.)
Many photographers have one or two “beloved” lenses. The focal length may suit one’s particular style, or a lens’s unique color and contrast might trigger a visceral reaction that endears it. If you go online to read about lenses, you will hear endless discussion of “bokeh.” Bokeh refers to a lens’s rendering of out-of-focus areas. Generally, photographers consider smoother better, because it improves subject isolation. Here are a couple of examples.