Selective focus (Bokeh) is what creates the visual appeal in head shots!
The recipe for creating such head shots is simple….
1) Focus on the eyes to make it communicate with the viewer
2) Open the lens as wide as possible to create a shallow depth of field.
In creating these three head shots of Janet Amrit, I used my Canon 85mm f/1.2 lens at f/1.8
Click first photo below to view entire series in slide show.