We try to switch out the judges' with some frequency, so the 2010 judges were a different set from 2011-12 and each judge will handle things differently. I've already posted what they're scoring on, and that's about the best insight I can give you for that, I don't have a full grading rubric designed for them (heck, I personally just learned about them this year) so I can't really give you details about how they determined if you got a 1 or a 10 on any particular thing.
Katsucon: Mari Watanabe (The Irregular at Magic High School) and Rachel (Final Fantasy VI)
Otakon: Doublade (Pokemon), San Otonashi (Rosario+Vampire), and ?????
Anime USA: Klefki (Pokemon)