I can see you in a number of different jobs, but I think I'm leaning the most towards Monk! The combination of your best/worst traits reminds me a lot of Monk characters such as Tifa, Zell, and Prishe. Monk characters like Tifa are pretty in-between when it comes to being introverted/extroverted; they're usually cheerful; are all right with taking charge but can let others take responsibility; in-between confident/modest; impulsive; more energetic (especially about stuff they like!); and they all tend to be okay with working on teams (and appreciate input from team members as well!). :)