I think it depends on the song. That song (which is one of my favorites!) is kind of like what she does during Kaja Kaja Goo, where she builds up her head/body shaking, and it reaches a climax during the chorus and she reeeallly goes crazy (example, haha. I just watched We ate the Show last night so that's where this is from). Hm, it seems like maybe during the NatP era, she was pretty active, since she also does the Peach Pie dance 'n all.
She didn't act so much robot-ish, I believe, during the 1st P and ADSRM eras. She acted really awesome, actually, like in this video where she sat on the keyboard and really got into the song. Of course, it's Modern, and that was a pretty crazy song XDDD In another video, she picks up the keyboard and runs around the stage a bit when Hiro breaks a string while crowd surfing. I wish this video was in better quality, but the awesome is still apparent!! I think it's funny when she picks it up again and then she and Hiro collide, rofl
It may have been around the NEU era (and definitely in the ENO and FYEP era) where she became more robotic. Of course, like I mentioned, for certain songs, she has a certain routine where she actually moves, like in Buggie Technica. It makes her interesting and very memorable, her on stage persona.
And haha, all those videos I've uploaded are from the Japanese Youtube (more or less), called NicoVideo. A bunch of videos were there, but for some reason, they were taken down. I download videos for my own convince (I watch them on my other laptop that isn't connected to the internet) so when I saw all these amazing videos weren't on the 'net anymore, I uploaded 'em to Youtube. In just a year of being a Polyfan, I've really been doing a lot, haven't I? XDD
Oops, here I go, talking to much again.....
I don't post here much anymore but I still have a fond appreciation for Polysics. Hit me up on Twitter @west_haven if you really wanna talk to me