most hardheaded

astute bullheaded hard hard-boiled headstrong intractable levelheaded locked in mulish obstinate pertinacious perverse pigheaded practical pragmatic rational realistic resolute sensible shrewd sober stand pat tough tough-nut unsentimental unyielding willful

easy easy-going laid-back merciful

astute hard-nosed headstrong obstinate practical pragmatic rational sensible shrewd sober unsentimental

bullheaded cool hang tough hard hard-boiled intractable level-headed locked in mulish pertinacious perverse pigheaded realistic resolute stand pat tough tough nut unyielding willful

irrational stupid submissive unrealistic unreasonable

yielding