Itachi doesn't talk much...and he has always had an expression on his face where its like he's thinking about something else, and doesn't need to concentrate on what's happening around him. Personally, I feel that those are the people you should just stay the fuck away from, or tell someone in authority and get them out of the picture fast. If you can't look at someone and get a general idea of their personality, or even their current mood you should be extremely careful... Itachi, I don't think....thinks in terms of "good" or "evil", "right" or "wrong". From what few words he's said, and his actions, we know that very arrogant, a deep thinker, sees and plans beyond the present, and has an extremely warped perspective of love, and loyalty. He loves his brother because he leaves him alive, cared for him when he was small, and wants him to grow stronger than him, but at the same time can kill everyone he knows...not just his ASSHOLE father....I would have killed him too, what a dick. And loyalty....well, I think he's loyal to anyone with strength, and if he feels as though one is holding him back, he'll either kill them and leave, or just leave. I feel Itachi has a very "Gokuu mentality" of always advancing, but he has taken the dark road and, grown complacent due to his narcissism, and has no passion...or at least doesn't show it.

That type of character scares me...and if I met someone like that in my life...I don't know what I would do.