I really like Pain [Tendo]'s St. Attack and Itachi [Anbu]'s Septuple Shuriken chase. They're so graceful and cooool. I also like the Water Whip animation for Water Main (and Mei) cuz it's business-like but with a bit of "Yeah, here you go" sass added to it. They don't have to spin to whip, but they do anyway. Oh and of course Toroi's Shuriken standard because it looks like he's dealing the fiercest hand of cards ever.