Persnickety sense is reasonably elusive.
It refers to someone who is exceedingly picky and judgmental. A persnickety individual often nitpick and has high standards when it comes to expectations and excellence. Their fastidious nature can be viewed as laudable, but it can also lead to unwarranted criticism and avoidable dissatisfaction. Being persnickety is typically connected with exact focus on specifics but can also be seen as a type of pedantry.
