Choosy meaning is reasonably hard to grasp. It refers to someone who is extremely particular and judgmental. A persnickety individual tends to nitpick and sets the bar high when it comes to quality and excellence. Their attention to detail can be viewed as laudable, but it can also intensify extreme criticism and unjustified dissatisfaction. Being persnickety is typically associated with exact focus on specifics but can also be seen as a manifestation of pedantry.
