My first thought was Thief also but I do see some black and white mage. You're cheerful, enthusiastic, stubborn and a bit bossy like some of the thieves from the game but at the same time you're more introverted and calmer like some other thieves (Locke for example). While this job class isn't really the leader type, there are some characters like Zidane who definitely fits. The way you described your "over-sharing" trait made me think of them too, if that makes any sense.