Observation of your question #3:  I believe so strongly in what you said in paragraph #3 "We are each unique, every one of us. " that I can't disagree with anything you've observed. Because I have worked in a number of places the holiday season (which includes Christmas) I've been immersed in all aptitudes, attitudes, and practices from traditional to rogue. In one company each wing and each floor had a decorating contest one year and the next year, even personal decorating was discouraged. (New leadership, new culture) One organization kicked off the holiday season after a Thanksgiving pot luck, then anyone who wanted to participate drew names for Secret Santa. The Friday before Christmas, the CEO played Santa and made a big deal out of passing out the gifts one at a time.
I've never worked at an organization where Christmas or holiday was not celebrated at all, but it seems that the larger the organization, the smaller the emphasis on making the holidays a memorable 'event'.