ugly, deformed, noisy, blurry, distorted, out of focus, bad anatomy, extra limbs, poorly drawn face, poorly drawn hands, missing fingers, nudity, nude, mouth, teeth 

Avoid depicting Omni-Man with a non-muscular or frail build, casual or tattered clothing, bright or mismatched colors, a lack of the iconic mustache, or any expressions or features that suggest weakness or indecisiveness.