You emphasized your impulsiveness the most in your application. To me that pretty much says Monk =)

They are honest, straightforward and blunt. While you definitely have the personality suited to Thieves as well, i.e happy, cheerful, enthusiastic, you say that it really depends on the situation, only if you know the person or are comfortable with him/her. I picture you as a more cautious Zell and Tifa haha...