I re-watched The Polar Express (2004). I absolutely love this film. I think it really just captures that 'feeling' of Christmas. It's hard to explain, but it really makes me feel like kid again. A lot of people really don't like the animation style of this film, but I've always liked it. You can't go wrong with Tom Hanks voicing the characters, too.
I think the fact I watched this when I was young-ish makes this a bit more special for me than other people.