Here goes, I'll try to keep it short;

1: Auron. Does what he needs to and does it well. Used to be ignorant but he learned the hard way.

2: Wakka. Goes from ignorant die-hard Yevon believer to killing a Maester, turning his whole world upside down and deals with it.

3: Kimahri. Actions are louder than words.

4: Tidus. His world goes upside down too. Despite all the hate, I always liked the fellow.

5: Yuna. She's alright.

6: Lulu. She's alright too.

7: Rikku. Never liked her. Her actions seem a little random, the party is way too forgiving after she attacked them and she acts childish too.