This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. The characteristic of being mundane; ordinariness; worldliness.

n. the quality or character of being intellectually sophisticated and worldly through cultivation or experience or disillusionment

n. the quality of being commonplace and ordinary

"In the first season the lives of these three men were just too mundane but a familiarity with the characters has grown over the past two seasons and now that mundaneness is enjoyable in its own way."

quality   

mundanity