You put that so well. My post Christmas/holiday blues didn't hit until after New Years in full. But the past week or so has been full of a lot of bittersweet nostalgia on my part, thinking of the past, etc. Also, it was my wife and I first Christmas married and it was so special. We just took down the tree today and I feel bad about throwing it away, it gave us so much warmth and beauty over the past month! In fact I think I will recycle it in the woods as I can't bear to put it out for garbage men.