* "My grandmother is a persnickety eater, refusing anything that isn't perfectly cooked and seasoned." (This sentence emphasizes the negative connotations of being persnickety.)
* "The art director was so persnickety about the font choice that it took hours to get his approval." (This sentence shows how persnickety can be used to describe someone overly concerned with details.)
* "Despite being a persnickety dresser, she always looked impeccably stylish." (This sentence uses "persnickety" to describe someone who pays close attention to detail, but in a positive way.)
The meaning of "persnickety" can be nuanced, so consider the context and tone you want to convey when using it in a sentence.