Choosy definition is quite elusive. It refers to someone who is extremely picky and disapproving. A persnickety individual often nitpick and does not settle for less when it comes to criteria and perfection. Their meticulousness can be perceived as commendable, but it can also lead to excessive disapproval and superfluous dissatisfaction. Being persnickety is often associated with exact focus on specifics
but can also be seen as a type of pedantry.