Han hadn't come back and saved Luke's skin because of anything the princess had said. Her opinion of his character meant absolutely nothing to him. He'd turned around because he liked the kid and didn't want him meeting an untimely demise.
Okay, maybe a wicked thrill ran through his body when Leia hugged him when he returned from the battle. After all, despite her unpleasant personality, she was a beautiful princess. What man wouldn't enjoy feeling her warm, curvy body pressed against his right after she flashed a radiant smile at him?
He still didn't like her though – at all.