Persnickety

1. adj.

Definition: turning too much attention on trivial or minor details

Example: the persnickety artist

Sentence: The persnickety chef gently placed the delicate garnish on the plate.

Notes:  Since I was really little, I've always loved this word.  I remember I used to be so persnickety about putting a sticker so that it completely covered the outline of where it was supposed to go!