most hardnosed

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

hard-boiled hardheaded no-nonsense tough-minded uncompromising

bullheaded inflexible mulish obdurate obstinate pigheaded stubborn stubborn as a mule tough unsentimental

sentimental