Judging can be very polictical can plays a role in who all you know who your trainer is or just how you conduct yourself out side the shows through FB, Twitter and interviews.

At any Npc show you will all come out together after pumping up and stand in a line facing the judges. This is were you will do your quarter turns and be judged on symmetry.
Tips- When in the quarter turn round the judges will say stay relaxed that does not me stand there! Have your core tight legs planted and lats spread with hands of in front of your hips. MAKE SURE TO SMILE!

The Mandatory Poses

In bodybuilding, there are eight mandatory poses:
Quarter Turns( discussed above)
Front Double Biceps
Rear Double Biceps
Front Lat Spread
Rear Lat Spread
Side Triceps
Side Chest
Front Abdominal & Thigh
http://www.youtube.com/watch?v=n8MYqkh6olg

Judges all have something they like better whether it be a small waist or huge wheels(legs)...but some key areas go as followed...

In order to score the different competitors, the judges evaluate different criteria that contribute to the overall quality of the competitors? muscular development. These criteria include Mass, Definition, Proportion, Symmetry, and Stage Presence, being all of them equally important. Mass refers to the perception of muscular size. Definition indicates the degree of muscularity brought about by the absence of subcutaneous body fat. Defined muscularity is necessary to fully display the development of the physique. Proportion implies an even balance of muscular development in comparison to each muscle group. Theoretically, having a ?stronger? body-part can be just as detrimental as a having a ?weaker? body-part. Bodybuilders must strive for equal development between all muscle groups. Symmetry denotes equal development of muscularity on both right and left sides of the physique. There is a common misconception with this term, which is often used to refer Proportion. Finally, Stage Presence includes posing performance and other factors influencing general appearance such as skin tone, grooming, charisma, and poise. Effective stage presentation is essential to display the physique to its maximum potential.

Key points on being judged-

1.)Mass
2.)Definition
3.)Proportion
4.)Symmetry
5.)Stage Presence

Anything else guys you want to add or more in depth videos let me know!