Did a quick sketch and rig to test animation for CGs. Looks silly, but it's just something I threw together in 40 minutes or so.
When I do actual CGs, I'd spend more time on the picture and rigging, obviously. In the above picture, only her hair and breasts are on different layers (which is why her face distorts), whereas in an actual CG, her head and features would be separate, along with any clothing. Hair would also be done individually.
I'll also spend more time on the breasts. With the nipples on different layers, you can make it appear as though the angle is changing. Same with facial features.
To be honest, I'm actually looking forward to making a couple animations for the game, I find rigging to be pretty fun. For CGs, at least, I think any animation will be better than nothing. Personally, static CGs don't really do it for me anymore. With an animated CG you can have sound effects, and vibration, and stages, and...well, it's much more interesting.