fussy

Synonyms: careful choosy conscientious conscionable dainty difficult discriminating exact exacting fastidious finical finicky fretful fuddy-duddy hard to please heedful nit-picking overfastidious painstaking persnickety picky picky-picky punctilious punctual querulous scrupulous squeamish stickling

Antonyms: uncritical undemanding unfussy