I can definitely see some Dragoon and Soldier...but you're kind of like a mix of the two and then the bluntness in your application makes me lean more towards the Monk class as well. Like you, quite a few Monk characters are able to see grey areas; are very honest; care deeply for those close to them; can easily get something under their skin and react strongly to them; are very stubborn; and can be quite cocky. Some, like Tifa and Yang, are more introverted than some of their more outgoing counterparts; are reserved; lean more towards being cheerful; can be both leaders or support roles in a team if it is required of them; are confident but not to the point of bragging about it; and appear calmer on the outside than they might be on the inside. Some don't necessarily like working on teams, but they know how to...and they often prefer focusing on the job at hand (like Tifa, Yang, or Prishe). Monks in the FF series are all for stimulation, so your answer about If it can stimulate my mind in any way, then all the better for things in your spare time fits them really well! :)

~Yay for FFX and FFXII love! Those are two of my favorite games in the series as well. ♥