This thread is a good idea!
Personnally I always feel bitter and frustrated after a loss, but the day after I usually move on and get pumped up for the next game. I don't like to blame somebody from the team in particular for a loss because it's always due to many factors and there is always the next game to move on.
For example, yesterday I was mad at the game 6 loss and worried about game 7 but now I'm feeling good about the C's chances for Sunday's game 7 and I can't wait to watch it, even though I'm still a little bit worried, of course.
It's always interesting to read people "live" reactions after a loss, when they criticize a player or say he must be traded, and it's often even funnier to read it again once the Celtics have won the following game and the player who got blamed two days before gets praised because of his good performance.
Emotional reactions are part of the game, whether it's for a loss or for a win and it's always interesting to read the fans reactions on Celticsblog in my opinion.