Jim prefers a quiet Christmas with no murders, maniacs or ex girlfriends on the loose. Harvey might come over for Christmas dinner but other than that it's just him and Y/N
Harvey doesn't do Christmas. The only thing about the holiday he likes is he drinking games and people leaving you alone. He'll probably order take out for Christmas dinner before passing out on the couch
Oswald makes a big deal out of Christmas. He'll spend the entire day with his mother ,reliving his childhood to the best of his abilities , and buying people things that are either too expensive or they don't need