Yo peeps, I was wondering, cause everybody has his or her own hero(in) in the show all with their own special abilities, what do you believe would make the ultimate fighter? pls choose from what we've seen till now, not what we think they are capable of ok
I'll start it off:

Gai's/Lee's speed
Tsunades strenght
1 eye of full Sharingan(Itachi)
1 eye of full Byakugan(Hiashi)
Naruto's willpower and Stamina
Sasuke's willpower(at times)
Shiki's intelligence
3rd Hokage's wisdom
oro's skills of making new jutsu's
Kabuto's calmness
Neji's Hakke and Kaiten
Haku's kindness and potential + ice mirrors of death
the 4th's sealing ability
Yiraiya's Rasengan
Kakashi's Chidori
Able to summon any bosses
Zabuza's big sword
Gaara's dessert coffin

And last but not least, Temari's hair