I'd have to think about it more, but I've found Shouganai Yume Oibito quite elegant and pleasant to watch :3
SEXY BOY is great for the simple fun
I'm not sure which one of the new ones is my favourite, but Ai no Gundan is definitely a contender... My fav is when they suddenly stop but their skirts are still in movement, it's so COOOOLLLL
And this comes to mind: I have mixed feelings about Shabondama; it looks great edited, but if you see everyone at once, you can instantly see if someone is even partly half-assing it or getting too tired to really get into it, and it can look pretty awkward. But edited to the "best bits", it has great raw emotion that I don't think any other MM choreography has had since, or before...