Do it! Now! Is my all time favorite, because I like how the members run over past the center to do their lines before going to the other side of the line and anything along the lines of that. Thought it was a good way to arrange all the singing people and whatnot xD
Manpower is my second favorite because, like Do it! Now! , I like how the arrangement goes so that it fits whoever's about to sing next and whatnot. And the thrusting = win.
Actually, I like all choreography xD Fun and easy to do xD (Yes, I know most of the choreography for H!P songs)