Riegler set one

Acerbic

Harsh/severe

Ambivalent

having mixed feelings (often conflicted)

Apprehensive

fearful or anxious, especially about the future

Bantering

playful teasing/witty

Benevolent

expressing goodwill or kindly feelings.

Callous

unfeeling, insensitive

Candid

Completely honest, straightforward

Capricious

impulsive and unpredictable

Clinical

objective, realistic

Conciliatory

overcoming distrust or hostility

Contemplative

studying, thinking, reflecting on an issue

Contentious

argumentative

Cynical

doubtful or distrustful of the goodness or sincerity of human motives

Defamatory

communicating false statements

Didactic

intended to teach

Diffident

shy, lacking self-confidence; modest, reserved

Disdainful

full of bitter scorn and pride; aloof

Earnest

Serious and sincere

Effusive

lacking reserve

Elegiac

Expressing sorrow or lamentation