Choosy importance is quite hard to grasp. It refers to someone who is vitally
particular and critical. A persnickety individual usually pay strict attention to detail
and does not settle for less when it comes to criteria and excellence. Their meticulousness can be seen as admirable, but it can also exacerbate extreme censure and unjustified dissatisfaction. Being persnickety is often associated with detailed attention to detail but can also be seen as a manifestation of perfectionism.
Pernickety Definition Meaning MerriamWebster