Choosy definition is somewhat hard to grasp. It refers to someone who is exceedingly particular and judgmental. A persnickety individual tends to nitpick and sets the bar high when it comes to criteria and excellence. Their meticulousness can be perceived as commendable, but it can also lead to excessive criticism and unjustified dissatisfaction. Being persnickety is typically associated with detailed attention to detail but can also be seen as a form of pedantry.
