Mary had neither genius nor taste; and though vanity had given her application, it had given her likewise a pedantic air and conceited manner, which would have injured a higher degree of excellence than she had reached.
– Jane Austen
Pride and Prejudice, Chapter 6. The narrator describes Mary, the plainest of the Bennet sisters, as she plays the piano at Netherfield. Austen is unsparing in her depiction of Mary: no genius, no taste, vain and conceited. It’s no surprise that Mary’s musical performance in showing off by playing a long concerto is a lot less popular than Elizabeth’s, even though she plays twice as well.