easygoing

Synonyms: amenable breezy calm carefree casual collected complaisant composed devilmay-care even-tempered flexible free and easy hang-loose happy-go-lucky indolent indulgent informal insouciant laid-back lazy lenient liberal low-pressure mild moderate nonchalant offhand outgiving patient placid poised relaxed self-possessed serene tolerant tranquil unconcerned uncritical undemanding unhurried uninhibited

Antonyms: agitated critical demanding hurried hyped intolerant nervous strict upset worried