* Formal: The restaurant's chef was known for being pernickety about the freshness of his ingredients, rejecting any produce that wasn't absolutely perfect.
* Informal: My grandma is so pernickety about her tea, she insists on using only loose leaves and a specific brand of kettle.
* Humorous: He was so pernickety about the arrangement of his bookshelves, he spent an hour meticulously adjusting the spines.
* Descriptive: The antique dealer was a pernickety collector, only accepting items in pristine condition.
* Sarcastic: She's so pernickety about everything, she even complains about the color of the sky.
Remember, "pernickety" often carries a slightly negative connotation, implying someone is overly fussy or demanding.