Fussy sense is quite difficult to understand. It refers to someone who is vitally meticulous and critical. A persnickety individual typically be fastidious and does not settle for less when it comes to standards and flawlessness.
Their attention to detail can be regarded as praiseworthy, but it can also magnify overly demanding censure and avoidable dissatisfaction. Being persnickety is frequently related to detailed attention to detail but can also be seen as a manifestation of obsessiveness.