Now the poll is a lot better, for my vote I would say Avatar Roku.

Why?

Even though he failed to maintain balance in the world by defeating Sozin, he showed many other admirable qualities. He certainly was very powerful, considering in the fight with Sozin he effortlessly beat him, showed great wisdom when providing help to Aang throughout the series, and was a very loyal friend. He saves Sozin when they are battling the volcano together even though he knew sozin's secret agenda (even if this did prove his downfall its still a good quality). Also Roku after Aang is the next avatar who we have seen the most in the series and so we know his story more than any other past Avatars.

I say Avatar Roku cause we know so much about his past. And he had a pretty cool life. He was best friends with Sozin...that was just too cool.

Avatar Kyoshi.....just not my favorite. I don't have a really good reason.

Avatar Kuruk just seemed lazy in my opinion. I mean, because he was so lazy his love's face was stolen by Koe(sp?)

Avatar Yang Chin...also, just not my favorite. We don't know a lot about her past though. Maybe if we did my opinion would change.