quirkiness

noun

the quality of being quirky, especially in terms of character, behaviour, etc.; peculiarity; eccentricity; unexpectedness

Wiktionary

noun

Etymology: Etymology tree English quirky Proto-Germanic *-inōną Proto-Indo-European *-dyé- Proto-Germanic *-atjaną Proto-Indo-European *-tus Proto-Germanic *-þuz Proto-Germanic *-assuz Proto-Germanic *-inassuz Proto-West Germanic *-nassī Old English -nes Middle English -nesse English -ness English quirkiness From quirky + -ness.

The state of being quirky.
“Your quirkiness is so endearing.”
“Chacombe: The one-bedroomed holiday home built into the mouth of the Great Central Railway tunnel, on the former Banbury-Northampton route, has won a number of awards for its quirkiness.”
A specific quirky aspect of a person or thing.
“"There are certain quirkinesses, but he is a very good neighbor."”