eccentricity
ec.cen.tric.i.ty \.ek-.sen-'tris-*t-e-\ n 1a: the quality or state of being eccentric 1b: deviation from an established pattern, rule, or norm; esp : odd or whimsical behavior 2: the ratio of the distances from any point of a conic section to a focus and the corresponding directrixor habit. ECCENTRICITY stresses divergence from the usual or customary and suggests at least mild mental aberration; IDIOSYNCRASY stresses the following of one's particular bent or temperament and connotes strong individuality and independence of action SYN syn ECCENTRICITY, IDIOSYNCRASY mean a strange trait, trick,
Webster's English Dictionary