Her distinctive mannerism of always tapping her foot when she was nervous was easily recognizable.
His endearing mannerism of always offering to help others without being asked earned him many friends.
Her quirky mannerism of always wearing mismatched socks made her stand out.
Her annoying mannerism of constantly interrupting others mid-sentence made it difficult to have a conversation with her.
His awkward mannerism of constantly fidgeting with his tie during meetings made his colleagues uneasy.