particular

4. ADJ : usu v-link ADJ, oft ADJ about n

If you say that someone is particular, you mean that they choose things and do things very carefully, and are not easily satisfied.

• Ted was very particular about the colors he used.
  

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4(b) Attentive to or concerned with details or niceties, often excessively so; meticulous or fussy. (Am-Heritage)

4. difficult to please; fussy (Collins Essential)

5. exacting especially about details; 

• "a finicky eater"; 
• "fussy about clothes"; 
• "very particular about how her food was prepared" 
• = finical, finicky, picky, fussy
• (Rel) fastidious - giving careful attention to detail; hard to please; excessively concerned with cleanliness; "a fastidious and incisive intellect"; "fastidious about personal cleanliness"

....... Thesaurus/WordNet3.0