I've already spoken about my take on this in another thread, but to reiterate: I don't so much celebrate it as observe it; or at least I would in the ideal world it used to be. To me, there is no more a religious aspect to the season and the day than there is to any other day. Food, booze, family, friends, booze, xmas telly, booze, lots of new toys to break, and booze.
At the age of five, Skagra decided emphatically that God did not exist. This revelation tends to make most people in the universe who have it react in one of two ways - with relief or with despair. Only Skagra responded to it by thinking, 'Wait a second. That means there's a situation vacant.'