Why is this poster making faces at me?

These Chernoff faces are a multivariate technique of visualizing data that relies on the human eye's ability to recognize patterns. Each object (QSO) is represent by a face and each QSO property is represented by a facial feature. In this sample, the facial features correspond to:

Face Width	CIV FWHM
Upper Face Eccentricity	Radio-loudness
Lower Face Eccentricity	Optical Lumiosity
Mouth	Optical/X-ray
Curvature	Spectral Index
Nose Length	Radio Core Fraction
Eye Slant	Radio Spectral Index
Eye Height	Optical Spectral Index
Eye Separation	H-beta FWHM

The first 17 QSOs are the ones that host NALs. How do they differ from the others? Are they happy? Are they sad? Do they scowl at you?