It's the best time of the year there. There is so much to do that it's hard to fit it all in. Some of my favorites are:
MVMCP - hot chocolate and snow on main street, Mickey's Night Before Christmas Show in Tomorrowland and another show at the castle, characters all over and if you go on a Tuesday, the crowds are quite low. A hard ticketed event.
Candlelight Processional - in front of the American pavilion in the World Showcase. A celebrity reading the Christmas story backed by a full orchestra and a massed choir singing carols. Amazing, but be sure to buy the CP package which includes a full dinner at one of the countries and reserved seating for the show. The show itself is free, but those without reserved seating might have to stand in line for a long time, and might not get in.
Osborne Light - at the studios. Millions of moving lights set to music and snowflakes drifting down. Magical.
Christmas wishes and the Christmas parade at the Magic Kingdom - not to be missed.
Decorations at the parks and at all the resorts - If you get a chance, ride the monorail to the monorail resorts just to check them out - for example, a full sized gingerbread house in the GF lobby with cast members inside selling gingerbread - a small group upstairs playing carols
Wow, I do go on, don't I, but:
Do decorate your room, try the hot chocolate at the resorts (it's to die for),
see the parade at AK, and much, much more....
OH, and have the time of your life............Laura