unfussy

cool cursory easygoing folksy homey informal laid-back mellow offhand

aloof apathetic blasé breezy detached down home incurious indifferent insouciant lackadaisical loose low-pressure perfunctory pococurante purposeless remote unconcerned uninterested withdrawn

agitated upset

deliberate formal painstaking planned premeditated serious

casual relaxed

easygoing everyday natural

breezy congenial down-home extempore familiar folksy free free-and-easy homey improv improvised laid-back loose low-pressure mellow off-the-cuff open ordinary spontaneous throwaway unceremonious unconstrained unrestrained without ceremony

buttoned-up dressed-up formal

rigid stiff

ceremonial ceremonious fussy

classic clean elementary modest plain pure uncomplicated

absolute mere rustic single spartan vanilla

austere discreet folksy homely homey humble inelaborate lowly not complex open and shut pure and simple sheer unadorned unadulterated unaffected unalloyed unblended uncombined uncompounded undecorated unelaborate unembellished unmitigated unmixed unornamented unostentatious unpretentious unqualified

abnormal abstruse complex complicated difficult dirty extraordinary immodest impure indefinite intricate polluted unchaste

aware cluttered convoluted decorated embellished exacting intelligent jumbled mature older on-the-ball ornate smart sophisticated unclear unintelligible