Rhythm and Texture

http://blog.navone.org/2009/09/rhythm-and-texture.html

Rhythm - how the actions or "beats" in a shot are spaced out over the length of a scene. You might also call this "tempo". Unlike with music, good animation has an inconsistent rhythm, making it less predictable.

Texture - the variations of timing and poses in your shot. Big and little actions, slow and fast timing, flurries of action and holds. A shot in which all the actions are the same size, have the same timing, and occur in an even rhythm has no texture.