Well, for one, you make judgements about people based on your perceptions of how someone should behave in a given situation. For another, you have no idea what is in Arcia's head. He may the type of person that shows something outwardly but he may very well be harder on himself than anyone behind closed doors. Maybe your an expert on reading body language but unless you are, you are just making a judgment about another person based on your opinion. You can decide what that says about you. My judgment of Arcia is contextual. I am not critical of him because he seems happy. I am critical of him because he appears happy and indifferent while being the least productive player given as many opportunities as he has been given. Since Arcia's debut, he's one of 185 players in MLB to amass 1500 plate appearances. His wRC+ ranks 183rd. In the history of the Brewers franchise, he's dead last in wRC+ among Brewers with 1600 PAs. This year--one of very few in the history of the franchise when they have a chance to make the postseason--he is having a historically bad season. He hasn't had a 2 hit game in nearly a month. His wRC+ is 58, the lowest of a qualifier in the history of Miller Park. If any of us were the lowest performer in our industry, it wouldn't be unreasonable for others to find a happy-go-lucky spirit to be a little off-putting.