I would think his sound would be of about the same importance as his looks,TiDUS.AHOLiC. His overall outlook at life and how he handles it is what I dislike about him most I suppose. His mix of optimism, lack of responsibility, and (dare I say) his cry babyish behavior. I can understand him being this way towards his father, but he incorporates it in whatever he does. Maybe since It's just because I dont have much optimism, but Tidus just annoys me with his. Ofcourse, as he said, laughter was the only thing keeping the group going so I guess it was necessary to help them persevere.