When E.G. and I moved in together, we each had our own ornaments from when we were kids. There were all kinds of eerie parallels -- we each had crafty aunts who made very similar felt Santas for us, and we even each had ornaments that we made with
those aunts, at similar ages, that featured the precise same plastic Santa figurine. Our Christmas stockings also might as well have been made by the same person. (Felt, rickrack, appliqued Christmasy things.) (Mine disappeared at some point, and I made myself a new one in the same tradition.)
E.G.'s mom wrote out the origin and other info about each of his ornaments. I did the same for mine, best I could remember. Every year since then, I've tallied up the new ornaments, so there are now several pages of handwritten notes in the ornament box.
Sozlet just helped me decorate the tree -- we've developed a tradition around it. Christmas music and Christmas cookies. She puts up her own ornaments, lower half of the tree. I put up glass ones and flying ones -- at some point it developed that the flying ornaments (we have a lot of birds but also flying bugs and some fairies) go on the top third of the tree.
The vast majority of them are probably from my mom -- she gives each of us at least one ornament per year, often more than that. Lots of homemade/ artisan stuff, I like most of them.
Sozlet makes them too and those are some of my favorites. She did this great winter scene with birds in 2007, she painted the glaze on a ceramic orb and then it was fired, it's so cool.
The star is a hand-blown glass exploding thingie that's meant to be an ornament -- it was a major splurge for me at a favorite art gallery in Madison. (Don't remember the price but around $25 I think -- I just loved it.)
I always get mushy when I put up the "our first Christmas" silver ornament, bought to fill out the rest of a gift certificate at a fancy place that was a wedding gift.
I could go on and on. Might post some photos of favorites.
Since we mostly only do the pagan parts of Christmas, the Christmas tree is pretty central to our holiday.