Fussy
Definition 1 of 2
Pro Tip 1/3
Particular Preferences
Use 'fussy' to describe someone with specific likes and dislikes that they express strongly. He's very fussy about his coffee; it has to be just right.
Pro Tip 2/3
Negative Connotation
'Fussy' often implies slight annoyance on the speaker's part towards the person being described. My brother is fussy about his room—it must be cleaned his way.
Pro Tip 3/3
Not Always Serious
'Fussy' isn't usually used for serious issues. It's for minor habits or preferences. She’s fussy about her pens, they all have to be blue ink.