All the parks will be pretty busy. We've tried parks on Christmas Day, but they have been so packed that we left. Now, we just hang out around the resort, have a nice breakfast, hit DTD, play some mini golf, and have a nice dinner. If we are feeling especially adventurous, we might try to hit MGM or Epcot just for Osborne Lights or Illuminations. If I had to pick a park, it would probably be Epcot for that day. Mk is a MAD HOUSE!!