Similar word to picky-picky:

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