Outward displays of negative emotion are overrated. I see no value in someone throwing a fit. In fact, not being able to control your negative emotions is typically a detriment. Sample size of one and obviously not on the professional level, but I had a bit of a temper when I played high school sports. Going into junior year, I made the conscious decision to be much more zen on the field. I don't know if being calm made me a better player, but it definitely didn't make me worse. I still had the fire inside, I just didn't lose my cool. Just because someone doesn't scream and yell doesn't mean they don't care. It just means they choose not to let their emotions get the best of them. On the flip side, I am all for showing happiness. Baseball is the absolute worst with unwritten rules and it pisses me off to no end that showing positive emotion or having fun is looked at as inappropriate.