I think it's a matter of temperament. My brother and I play all kinds of games together (not chess anymore...I studied, he didn't), and I've always been emotional about losses. He just doesn't care....win or lose, he goes to the next game. I'll talk to him the next day and say "In game 3, I should have gone X,Y,Z, and I would have had the better chances to win" and he'll reply "I don't remember that game."
You see it at the professional level too. Naka does a Jim Carey impression, calls himself a "moron" after the game, sometimes storms out before giving an interview. Kramnik can be 3 queens down, and he looks exactly as enthusiastic as he would in an art gallery or on a roller coaster or making love to his wife.
I don't get angry when I lose. But I get irritated with myself for making a really silly blunder. Then I become a little sad, because the blunders I make now I would not have made 50 years ago. It's rough to get old.