Green Lantern didnt mean to boast, but his attitude was very logical and surely he was usually right. When his silly team members wouldnt step up to the plate to do what was right, then it was only natural that he do so. He was a Green Lantern after all! He probably had more experience than any of his teammates. That, Green Lantern DID know.
He remembered the events that happened in the episode Secret Society. He remembered that he had to take the charge because everyone was sure as heck unwilling to lead. Green Lantern knew that he had the battle and mental experience for leadership. What was wrong with him trying to help?
He felt that he was considerably underrated compared to the others. Often people would cheer if they saw Batman, Superman, Wonder Woman or Flash. They would just nod in approval if anyone else; including himself stepped up to the plate. He wasnt implying that he wanted glory or anything; he just thought that itd be a little nice if the others were more recognized for their good work, especially him.
Green Lantern was a man of pride, and he felt his pride become damaged by Hawkgirl. It hurt him to realize that she had betrayed them and spied on them, but what hurt more was the fact that he had actually allowed himself to fall for her. Now they were in awkward around each other. As much as he hated to admit it, he was wrong and Batman was right. He shouldnt have dated someone on the team. It was too risky.
Green Lantern didnt take his pride too seriously like some arrogant people out there, but he hated it when it was damaged by anyone. Like Batman, he needed to know you well to trust you. He took pride in his friends, the Justice League, but he would continue to give them small pushes in the right direction.
Green Lantern if you look at some episodes it seems like he has a lot of pride and dignity. To be honest, I really like this Green Lantern and Im glad he was thrown in there instead of Hal Jordan or something. Although hes very difficult to draw. :( Anyway, stay tuned peeps! :)