Someone at work sent this link to me today.
He talks about how with games, a lot of focus is spent on making the feet correct and what-not and the head is the last thing that an animator thinks about because they have to make sure so many other things are working. But the people who play the games are going to be focusing on the head, so its important to make sure that it properly balanced with the center of gravity. He shows some good and bad examples from different games. If you're an animator in the games industry, definitely give it a read. Good things to think about.