>>2777370protip: if you hit R to reset the pose, your girl will say something. Try catching them mid-sentence and you can get some fun facial expressions that can't be had otherwise.
Also, a more common one, but you can hit G to toggle off/on whether she's looking at the camera or not. When you toggle it from off to on, she will always blink. You can use this to your advantage to pause at the right time and give her a more relaxed gaze at your whim.