What are Hermione's flaws?

She's a know it all. She can't stop herself from showing off how much she knows, despite how it makes her unpopular.

She can also be narrow-minded, as seen by how she treats Luna's beliefs and how she dismissed the idea of the Deathly Hallows really existing.

In Halfblood Prince, she was jealous and didn't deal with it well at all. However, I don't think she's shown this particular flaw in other books.