Pixelated
Oversaturated colors
Too dark or too bright
Too much noise
Flat lighting
Unbalanced composition
Unreadable text
Unnatural perspective
Unintentional lens flare
Overuse of blur or bokeh
Unnatural shadows
Poorly placed or distracting watermark
Overuse of symmetry or repetition
Busy or cluttered background
Unrealistic or impossible poses
Poor use of color theory
Bad camera angles
Incorrect lighting direction
Incorrect focal point or depth of field
Lack of attention to detail

Cropped image
Out of frame
Draft
Deformed hands
Twisted fingers
Double image
Malformed hands
Multiple heads
Extra limb
Ugly
Poorly drawn hands
Missing limb
Disfigured
Cut-off
Grainy
Low-res
Blurry
Bad anatomy
Disgusting
Mutilated.