Definitely attitude. One of the things that eventually led me to not liking the character as much, was his handling of Worf during "Reunion". At the end of the episode, he reprimands Worf for handling the murder of his spouse in the way of his people. It showed me that Picard had no real respect for other cultures. It's where the differences with TOS really began to show. In TOS, they were out learning about the universe. In TNG, they came across as missionaries teaching the unwashed masses how great humanity was.