I think you're very much a Thief. I just get a very light-hearted and upbeat feel from this app from the humor you listed as one of your best traits, marking the far extreme of extroverted, and being cheerful 95% of the time. Very thief-y. I can see Soldier (of the Tidus variety but not really other soldiers?) and Monk as well (seriously, I was worried this would be my third Monk vote today) but I think Thief wins out in the end.