Jugo. I'm similar to him the most.
I know he has a had a bad life, loosing Kimimaro, among other things, but I think there's a light at the end of tunnel for him. He sort of had a second chance, with his buddy Suigetsu and even Karin to some extent. Mostly Suigetsu. Suigetsu brings laughter and fun into his life. A friend like that helps feel the void of loosing someone he loved, Kimimaro.
Personality? He's loyal, caring, and understands sometimes. Other times his temper wins, but I think he's come a long way.
Power? It's just a really cool power. It reminds me of Two-Face, who I really like a lot.
Also, he may be in some big battles and he's not the strongest, but he always pull through giving it his all. He's like the student who everyone sort of likes, mostly, or atleast they don't hate him and he scores a B mostly. He's reacurring and a good guy.
That's why I pick Jugo.