You have to blame the writers for not adding some much needed personality to Nero. I'm not a fan of writers using a character's motivation (ie. his/her family was killed) as the only aspect of a character's persona. That single event should not solely make up a character's personality. Nero should have come across as completely insane, cold and calculating or mabe a mixture of the two. All we got was an actor delivering some stale lines. "Frequencies please sir" Cmon, this guy should be insane! Maybe Eric Bana could have done some more research and added some more depth to the character as well.