Why isn't Christmas Christmas?

For a while now, I've had trouble with Christmas; with the tired old songs we sing every year, the same scenery, the same sermons. Last year I could chalk it up to just being out of it, but this year... I certainly recognize the importance of Christ's birth. God was born a human without original sin to the descendants of David, a legitimate contender to the throne of Israel had it existed then, as a child so he could experience the complete human experience. I'm thankful for that, but I'm thankful every day for that. This year, the thing that has stood out to me most about Jesus isn't His birth, His death, or His teaching, but his humanity; the idea that God came down and experienced 30 years of normal life as just-another-person as far as most were concerned so that He could fully understand what it is to be human; what it is to labor, what it is to struggle, what it is to be tempted, what it is to be kept awake past when you want to sleep, what it is to be nagged at. Perhaps the understanding that God understands us so completely, not just as an observer outside of time, but as a co-participant in life so blows my mind that the rest pales in comparison; I don't know, but I certainly hope I figure it out.