How the character sleeps or interacts with essential props....really, the list goes on and on of what information is important to know. Does it ever end? I suppose when the story or the production concludes is when the list of behaviors/attitudes/poses is done. (At least by whomever the creator/artist that created that character.) However, the torch may get picked up by another artist :)
If your character has a job occupation/mission/purpose, that must be
included too in their attitudes/expressions to further explain who this
character. What they do and how they do it is very important as well as
any props they interact with or sidekicks they work/live with :)
Designing a character is so much more than a pretty concept doing some cool pose. Character designers must define EVERYTHING about the character they're drawing. From the way they they move, to how they smile, frown, pick up an item, jump, run, falling down and the list goes on for miles. This is why the character's anatomy is so critical in order to communicate this information. All those circles, ovals and other shapes that make up the anatomy are the visual foundation of every character (even the ones made in 3D CG).
