Some people like players who do their job and show no emotion... I don't give a rip how you carry yourself as long as you do your job.
Its really not a big deal but some people hold onto these things because it gives them a reason the whine after a good play.
As Chadman said, it has to do with context. When you're down double digits and are 0-3, no one wants to see someone celebrating a first down. I'm tired of all of the "first down" gestures around the league, period. The first person I remember doing that a lot was Hines, and even that quickly lost its novelty.
We're in a tailspin as a team, and while those little celebrations are not detrimental to our play, I think it's bad form and completely unnecessary.
Isn't it a fair assumption that there are players on the Steelers seeing it as we do, and questioning where Brown's head is when he's acting like a self-involved twit when the team is getting run over?
Separate issue, but about a year ago, I watched large chunks of Super Bowl 13 (Steelers 35, Cows 31) on youtube, and its striking how little celebrating both teams did compared to today. Big plays, and people simply get up and walk to the huddle. I like it much better, but I understand how some fans would like constant jacking around.
I think the intensity and passion is more productive before the whistle, not so much after it.
Narcissistic injury is the term used for any threat to a narcissist's outsized ego or self-esteem.