I cant really say, they have all had a huge impact on me but i guess it would have to be naruto. I have pretty much based my life around the ideals of naruto not to mention i am a practitioner of parkour, freerunning, and martial arts tricking, which is all pretty much ninja training haha. It has also just made me a happier person which i can actually credit to all anime, so sorry for the mouthful of an answer but naruto haha.