We have seen Luffy as a loud, flamboyant, likable character who is no doubt a big fool..typical shonen stuff....but his actions make me wonder that is he really that dumb or he just likes to play the fool and let others carry the responsibilities that seem trivial to him? I mean his traits of selfishness and stubbornness are known to all but his instincts and his ability to understand grave situations without much pondering makes me wonder that he is not that stupid...what do you guys say?