As with just about everyone, he was nice and friendly. To follow up with the nice and friendly comment, as he was walking through the convention, people would stop him and take selfies. Even when he was moving with a purpose, he took a few seconds with fans.
The reason this was nice was he was charging people for selfies at his table. He could have politely redirected the fans to his spot on the floor and let his handler collect the money. Instead of worrying about lost income, he making a few people happy.