What are some examples of own willfulness in the play Romeo and Juliet?

Both R and J demonstrate willfulness. Despite all the signs that they should not get married, they still do. When Romeo finds out Juliet is dead, he screams, "I defy you stars". He is defying or rebelling against the fate Heaven has handed down to him. Romeo won't accept his message that Juliet is dead. Juliet similarly will not accept not being with Romeo. At one point she tells the Friar that she longs to die if she can't be with her love.