My sleigh cruises around to all the Christmas forum boards listed here. Occasionally, I'll even be parked in a couple of yahoo Christmas groups. Some of us have more time to cruise and some don't. That's why you'll see some of us all over the place and some sticking to one or two sites.
Like Jeff, I tend to enjoy the uniqueness of each site. The Spirit of Christmas permeates all. I don't tend to get caught up in the healthy competition nor do I mind reading other site promotions. The different boards/groups are like a Christmas neighborhood or mall with plenty of homes to visit or shop.