We don't "dress up" for Christmas, but the best day would probably when they have Santa? At least I think they did last year, but since we had no kids with us I could be wrong. I'm thinking the characters weren't dressed up the whole cruise though cause I have a pic with Goofy in his pj's.
I don't see the problem with a Disney addiction, especially since I am a stock holder
Last year was the first time we did Parrot Cay instead of the BBB and loved the peace in there. I think what we do depends on when the room will be ready and if they have a concierge lounge to hang out in. We tend to avoid the sail away party at this point, but maybe we'll go this year.