you mean like periodically looking behind her or just slightly moving it right and left?
both are good of course
I actually went ahead and added a little rotation, because mentioning it made me want to do it.
Yeah basically the head just rotate back and forth a bit. When you do animations like this you have to think about every little thing.
I'm also going to make some blinks that can be mixed in randomly just to make her more lifelike in the game, and maybe some idle fidgeting motions.
edit: er what a self promotional top of page