fussy
adj.hard to please because you care too much about small, unimportant details. You use this to describe someone who is very picky about what they like or how things are done.
adj.excessively concerned with or fastidious about trivial details; difficult to satisfy. Often used to describe children's eating habits or an overly decorative style.
“My cat is very fussy about what brand of food she eats.”
“The new manager is quite fussy about the office layout and insists that every desk remains perfectly tidy.”
“The interior designer avoided using fussy patterns or elaborate ornaments, preferring a minimalist aesthetic that focused on clean lines and natural light.”
Often used predicatively after linking verbs like 'be', 'become', or 'get'. Frequently takes the preposition 'about'.
“For kids who are fussy eaters, freezing fruit juice or smoothies into ice pops can be a good way to help keep them cool.”
From fuss + -y.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.