Ugly
Deformed
Noisy
Blurry
Distorted
Out of focus
Bad anatomy
Extra limbs
Poorly drawn face
Poorly drawn hands
Missing fingers
Nudity / Nude
Morphing
Erratic fluctuation in motion
Bad quality
Grainy
Low resolution
Oversaturated
Lack of detail
Inconsistent lighting
Inconsistent colors
Shaky
Digital noise
Overexposed
Excessive shadow
Dimensional inconsistency
Weak contrast
Unwanted reflections
Broken frames
Color distortion