[Nathan]

"ore" is the very rough way a male would refer to himself, rather than "watashi". Correct me if I'm wrong, but I think it comes off as arrogant?

Edit: One thing I will mention in this spot, some Japanese have differing opinions on this. I had two different Japanese males tell me to use "boku" and "ore" more, although it may have been in jest.

"omae" is the rough version of "anata"(you). I rarely even used 'anata' when I was in Japan. I tended to just use their names. It tends to be more polite to speak in the 3rd person than 1st/2nd. Once again, I may need correction.

"kisama" is a straight and pure insult.