Sasuke-My best character. He's got everything you want in a fighter (except a guard break chain...)
Kimimaro-He's pretty tricky to master, his Cutscene Jutsu (Thorn) is very hard to hit when you try to start it up when the opponent bounces. Either than that, he cool
Kabuto- Da pimp himself! his Nehan Shouja no Jutsu (I think it's Feather Illusion in English Dub) is the best, I can get them an easy ougi. Either than that his Chakra Scalpels are beastly and the slow effect is awesome
The Nidaime-NWWOOAAHH!!! -Lol- The Second is fun because his entire playstlye can fit with his Infinite Darkness Jutsu, although his ougi is tough to land, you'll need a speed pill (not the drug!) and guard break your opponent.
Butterfly Chouji- I only use him during casuals, not tournament fights. He's pretty mediocre though compared to OTK and CS2