I do like Christmas Pudding but I sometimes find it to be too chewy plus it's very filling and fattening... I don't want to get to the stage that I was at about 3 years ago, the amount of weight that I've lost since then is amazing.
My favourite Christmas food is most probably... Ugh... Roasted Potatoes (as long as they're nice and crispy) and Yorkshire pudding (same rules apply. :P)