Gaara:
He may have been a devil in his youth, but he turned his life around through the influence of Naruto and others.
He went from psycho-killer to kazekage in a matter of 3-4 short years. This shows his ability to learn on a values/moral based plane of existence. He shows that no matter how terrible one's existence is, you can still do a heel face turn and make things right within your sphere of influence.
Bee, Naruto, and Rock Lee:
The resolve demonstrated by these three guys is most admirable. All three have been subject to ridicule for what they are (Naruto-demonfox, Bee-demonoctapus, Lee-ninjutsuless ninja) are yet they refuse to be discouraged. Bee is determined to maintain a positive attitude no matter how tough the situation may be. Lee is a genius of hard work and strives towards his goal despite the obstacles presented before him. Naruto shares many of these same qualities and continues to demonstrate compassion, love, and understanding towards almost all individuals he meets.
Minato and Kushina:
They exhibit their undying love (it's a pun, haha) for their son. Even in death, Minato and Kushina look after Naruto, in a way. Being a loving and supportive parent is something we all can strive towards (assuming you have kids).
Hinata:
Even though her father didn't give a **** about her for a while due to her shortcomings as the heir to the head family, she still fought to improve and perform to the best of her ability. Naruto inspired her to adopt his nindo as her own; hence, she adopted many of his more admirable traits from watching him as well. While her positive traits may be borrowed/inherited from others, it doesn't discredit her passion to become a better ninja and a better person. In addition, she also demonstrates her selfless devotion to benefit he whom she admires, which is a form a love (agape, according to Thomas Jay Oord).
Itachi:
Quite simply, he was willing to sacrifice everything for what he believed in. While I might not agree with the killing his entire clan thing, I still think it serves to demonstrate just how dedicated he was. Itachi reasoned that the good of the many outweighs the good of the few, and so I admire his loyalty to his ideals.
Many valuable lessons can be learned from mere fictional characters. Applying these lessons to everyday hum-drum life takes heart.