I could see quite a bit of White Mage AND Monk in you (especially when I take into account characters like Prishe who uses a combination of those two jobs as her fighting style--actually, I could see you being quite similar to her in a way!)...though I think I'm leaning a bit more towards a Thief vote overall. Many characters who fall into the Thief job are loyal, considerate, and helpful characters (such as Edge, Vaan, Zidane, Yuffie, Rikku, Locke)...though they can also be rather harsh at times (Shadow, Yuffie, and Edge in particular), and there is at least one example of a Thief/Ninja character who can be somewhat more reserved and less open as well (Shadow). They tend to be described more often than not as rather friendly characters once they've gotten to know people, tend to be cheerful, are more supportive (though a few such as Edge, Vaan, and Zidane do display leadership qualities at times), tend to be more confident, some of them are quite balanced in terms of reserved/impulsive behavior (such as Locke and Zidane), and they tend to be more energetic though usually not to the point of annoyance as well. I could even see quite a few Thief characters from the series agreeing with your thoughts on group work too! :)

And yay for FFX, FFXII, Zack, Balthier, AND Fang love! ♥