most cocksure

arrogant brash bumptious certain conceited confident egotistical hotdogging hotshot hubristic know-it-all lordly nervy overconfident overweening positive presumptuous self-confident smart aleck smart guy smarty smarty pants sure swaggering swollen-headed vain wise guy

humble modest uncertain unself-confident unsure

arrogant brash certain cocky conceited positive sure vain

diffident modest