Ned Raggett of AllMusic said that "Sulk" was "very much the Associates at probably the best period of their career. Mackenzie's impossibly piercing cabaret falsetto rivals that of obvious role model Russell Mael from Sparks, while Rankine's ear for unexpected hooks and sweeping arrangements turns the stereotypes of early-'80s synth music on their heads. The bass work from ex-Cure member Michael Dempsey isn't chopped liver either, and the result is a messy but wonderful triumph no matter what version is found."