Tidus is ......... well ........ Bratty in my view. He seems to hate change and he interperates everything so slowly. He can't accept his life, so he relies on others to drag him throught life. He coulden't care less for any one else, like the people that died in the begining, and only thought for himself, and trying to get home. When the truth bores into him, he fights Sin hoping it to pull him back into the past, instead of living a normal life.

Closer to the end, he seems to have grows out of his childish views, and now his goal is to.............. kill his father......( he didn't change after all)