LOVE
Decorating the tree with my kids.
Their excitement and anticipation.
Hearing from people I only hear from once a year.
Christmas Day with just the four of us and avoiding the big family celebrations 
Mulled wine, mince pies, champagne and all the yummy food of Christmas (but not too much of it - I hate feeling over-full).
Midnight mass, if I have the energy to go, which I usually don't.
Going away immediately after Christmas and missing the crappy post-Christmas lull until after new year.
HATE
The rampant commercialism and materialism of Christmas. All that Black Friday business and pictures of people fighting over huge TVs made me feel utterly sad and depressed. When did Christmas come to this?
The expense of shopping for 15 people, plus two stockings.
The planning and stress of making it all happen.
Writing bloody Christmas cards.