I’ve discovered you can learn a lot about a person by watching them game, especially if they are frustrated.
For example, I was watching a friend raging while trying to get around an obstacle course in a game he was relatively new to. He kept raging about an obstacle he was having a hard time with, which was resulting in him falling and having to do the whole course over. But he didn’t notice that he was learning quickly and getting past previous obstacles in the course almost without effort that were driving him crazy before. It made me realize a lot of his anger results from where he puts his attention, and failing to notice his own growth.