This is intended as a resource for creative writers for character development. It's meant to include all major categories of how people can be described.
Emotional Excess — Anger, anxiety, depression, disgust, bliss, surprise, suspicion, confidence, phobias, paranoia, apathy, embarassment.
ADD / ADHD
Attention-seeking / Attention-avoiding
Addiction — To alcohol, drugs, sex.
Conflict-seeking / Conflict-avoiding
Authority respecting / Authority defiance
Adherence to social conventions
Stable / volatile
Agreeable / Disagreeable
Detail-oriented / Big-picture oriented
Down-to-earth / Shallow
Stimulus-seeking / novelty-avoiding
Overreaction / under-reaction
Stubborn / Suggestible
Dominant / Submissive
Mature / immature
Selfish / unselfish
Compassionate / Empathetic / Uncompassionate / Unempathetic
Judgements by others — beautiful, ugly, mediocre, competent, incompetent, loyal, devoted, reliable, efficient, and productive
Fears — Rejection, performance anxiety, judgement, stage-fright
Optimistic / Pessimistic
Hostile, abrasive, cruel, dogmatic
Sadist / Masochist
Deferential, pleasure-phobic, servile, blameful, self-effacing
Warm / Cold
Unconcerned, dispassionate, fearless, shameles, restrained
Assertive / Submissive
Active / Passive
Fantasy / Concrete
Trusting / Distrustful
Straightforward / Deceptive
Altruistic / Exploitative
Compliance / Agressive
Modest / Arrogant
Tender / Tough
Orderly / Disorderly
Dutiful / Irresponsible
Goal-oriented / Journey oriented / lackadaisical
Disciplined / Negligent
Deliberative / Rash
Size — Height, fingers, toes, arms, legs, heads, eyes, ears, noses, mouths, lips, cheeks, chins, cranium, neck, torso, femurs, calves, feet, hands, bodyfat, hip width, .
Number of appendages — Fingers, toes, arms, legs, heads, genitalia.
Color — eyes, skin, hair, nails, genitalia.
Shape — Body shape (T-shaped, pear-shaped, beanstalk)
Smell — Acidic, metallic, body odor.
Skin blemishes or conditions — Birthmarks, eczema, psoriasis, leprosy, albinism, impetigo, vitiligo, body hair.
Sexual — Hermaphrodite, ambiguous, viril, impotent, gay, trans, bisexual.
Performance — Strong/weak, stammers, stutters.
Handicapped — paralyzed
Sensory — Cannot feel pain, have additional kind of cones in eyes, synesthesia, sight, auditory, taste, smell, temperature, pressure, mute, deaf, blind, tone-deaf.
Vulnerabilities — Bones break easy.
Disfigurement — From acid damage.
Usual traits out of place — young but looks old, old but looks young.
Body modifications — Piercings, tattoos.
Disease — Cancer, heart disease, HIV, Hepatitis, Clamydia
Disorder — Epilepsy
Dysfunction — Allergies, asthma, arthritis
Reputation — Liked, unliked
Group membership — Socioeconomic, racial, gender
Perception of abilities — Competent / Incompetent
Math, art, music, dance, coordination, spatial, strength...