mannerism, foible, idiosyncracy, idiocrasy, idiosyncraticity, idiosyncracity, characteristic, seity, habit of body, manner, more...

norm, normal, regular

personal, individual, own, peculiar, mere, marked, national, little, particular, special, human

unique mannerism,   personal quirk,   unique dislikes,   a quirk,   speech mannerism,   quirky trait,   personality quirk,   behavioral quirk,   quirky habit,   verbal quirk