I have two favorites: Kakuzu and Hinata
First of all Kakuzu is a flat out badass. Kakashi just introduces the fact that shinobi have one MAYBEE two elements, and the guy goes and throws out all of them except water (manga wise). Then you find out he is from Hashirama and Madara's time. He looks legit, and his fighting style is absolutely sick XD!
Hinata I like for her personality! Her gentle nature closely follows my own personality along with her willingness to help others. Also, she has been behind Naruto from day one, and I'm wondering how that will play out when everyone thinks highly of Naruto...I'm wondering if he acknowledges that XD. I also like the Gentle Fist fighting style, and from the anime I loved how Hinata had her own unique style of the Gentle Fist. Had she been able to keep Protection of 64 palms and the Chakra Needle technique they could have made her actually be a strong Shinobi! Can't wait to see what Twin Lion Fists can actually do!!!