She was bored by his lack of spontaneity.
I think you just used one.
Tom was admired for his originality, spontaneity and creativity.
John was known for his spontaneity, because he always had new ideas about fun things to do.
Example sentence - I appreciate spontaneity.
How to Calculate a Prison Sentence
How to Write Addition and Multiplication Sentences
Difference between a Prison Consultant and Sentencing Expert
Incarceration Guide - Sentencing Consulting Firm