Fastidious

{fa-ˈsti-dē-əs}

  1. very attentive to and concerned about accuracy and detail.
  2. excessively particular, critical, or demanding; hard to please

Example of fastidious in a sentence:

  • Arrogant and fastidious, the diva made no friends on her music tour.
  • While Henry would eat just about anything, his wife was so fastidious she barely ate anything.