(n.) A connoisseur.

aesthete amateur annotator arbiter arbiter elegantiarum arbiter of taste authority bon vivant captious critic carper caviler censor censurer collector commentator commenter connaisseur connoisseur critic criticaster criticizer critickin criticule dab dilettante editor epicure epicurean expert faultfinder good judge gourmand gourmet judge literary critic man of letters maven muckraker proficient refined palate reviewer scholiast smellfungus social critic specialist textual critic virtuoso