Juliet evolves from pacifically obedient and dependent daughter to a powerfully independent woman as a result of her discovery of passion. While Shakespeare uses Romeo, or love, as the object of Juliet’s passion, one may argue that any passion can serve as the vehicle through which an individual can "come of age."

As Juliet becomes engulfed by her passion for Romeo, she simultaneously develops the characteristics of a strong individual thinker and non-conformist. One must assume that her upbringing and family traditions have engrained in her mind a hatred for all Montagues, but Juliet’s individual passion and intellect prove strong enough to override this cultural programming. She begins to perceive the fruitlessness of the feud and its downward spiral of violence and denounces her family’s hatred. This defining act of her individuality leaves Juliet isolated from the rest of her world. Despite the peril and difficulty that her decision brings about, she bravely continues to stand behind her passion and ideals. This fortitude is exactly what characterizes a hero and a strong individual.

As often is the case with heroic non-conformity, Juliet suffers the wrath of the conformist majority. The rest of the world initially demands that she simply do as told and maintain the status quo; her refusal to do so infuriates and offends her family and all those in Verona who "love hate" and the continuation thereof. Juliet’s passion for love overcomes and ultimately conquers the feuding families’ passion for hate; her strength, resolve, and courage to follow her passion bring peace to warring Verona.
This is a fine response, very thoughtful and thought-provoking.  It is perhaps a bit too general, or it tries to leap to the broadest possible range too quickly.  A bit more particular focus (and some direct quotes) would help.  But your emphasis on "passion" and J's self-reliance is quite strong.  (9.5)