It is really all about the dials on the head so yes the Vicky, Mike, &Stephanie models work best because they have the most dials. Key dials I find for making liknesses to real people are face shape, jaw/chin, eyes - closer, rounder, slant; emaciated, nose - tip, nostrils, slope and bump; mouth- up/down, lips full/thin. width. I do tend to give a touch to the ethnic dials, but very little, just to set a palette if Iknow the ethnicity of the person. A big tip is using minus instead of add. In some cases minus top lip full is better than plus lip thin. The same goes for other dials.