Eccentricity has always abounded when and where strength of character had abounded; and the amount of eccentricity in a society has generally been proportional to the amount of genius, mental vigor, and courage which it contained. John Stuart Mill
Idiosyncrasy, from Ancient Greek, "a peculiar temperament", "habit of body" is defined as an individualizing quality or characteristic of a person or group, and is often used to express eccentricity or peculiarity.
The amount of eccentricity in a society has generally been proportional to the amount of genius, mental vigor, and moral courage it contained. That so few now dare to be eccentric marks the chief danger of the time. John Stuart Mill