We've been posting a bunch of videos at Creative Juices, lately. Back to drawing. Just moments ago I had a chance to hop on over to John K's blog, where he's talking about a term I'd never heard used before: how to avoid twins in your poses. See Mickey, above.
As quoted in "The Illusion of Life": (I think we have it kicking around the studio)
"Another sign admonished us to watch out for 'twins' in our drawings. This is the unfortunate situation where both arms or both legs are not only parallel but doing exactly the same thing."
Drawings like this should remind you of how you probably started drawing when you were a kid. I drew countless Ninja Turtles that looked just like this. John talks further about how this ties in to avoiding symmetry in your drawings, period. Symmetry has the effect of sucking the life out your character. He posts tons of great model sheets of Mickey to show what an alive character should look like.
I'm mentioning this as a reminder to all you Flash animators (that means you, Fablefolk!). It is INCREDIBLY easy to be tempted to copy, paste, and flip arms and legs to save time. Especially when you have a character facing forward. Every shortcut has a consequence. If you can spare the minute or two that it takes to rid your drawings of symmetry, they will appear all the more lifelike...less mechanical.