That's kind of sad? Perhaps it's time to get a 2nd tree? My mom got like that when I was in high school, so she got her "own" tree (an adult tree with only white lights, red bows or ribbons or whatever, and crystal ornaments from Mikasa. There was a pretty angel that matched on her tree, and it was in the den where she watched TV and cross stitched. We had the old family tree and all the old family ornaments and multicolored lights, with a star on top, in the family room where we hung out. In the kitchen, we had a norfolk pine all year long and that was a Cajun Christmas tree during Christmas, but changed decorations for different holidays throughout the year (instead of garland we had dried Spanish moss, and little crawfish ornaments, a crawfish dressed as an angel on top, little "bags" of red beans, rice, or whatever wrapped in toile, hot pepper lights, little tiny tobasco bottles that we made into ornaments, etc).
The way I think now is that Christmas, while you have the kids around, is really more "for" the kids. We have a big, lovely tree in the main room of our house now, and it is for the FAMILY, as the kids would see it. I, too, have an ornament box for each child, and a couple for mom and dad. I write the initials and year for each ornament, and we put the tree up, get the lights just perfect, and then just wait. Have a snack, drink some warm punch, go through the ornaments a little at a time, tell stories of when we got an ornament and why (can be short, not long stories but more like "Aw! This puppy ornament is for the first year we had a dog---doesn't she look like Sally? This yoda--yes! For your first party with friends, a Star Wars birthday party!" We giggle a little at the handmade ornaments that they made in Sunday School, we measure their hands and feet now (I have a handprint from my 1st son, a footprint from my 2nd from when they were just 1 month old, and this year we made hand-shaped santas out of salt dough, so it's fun to compare tiny hands to their current hands). Those things are nice. They are our story. The boys love hearing it, and seeing ornaments from mom and dad's first Christmas together, the poker chips ornament from when my mil said I must be quite a gambler taking a chance on her son when we announced we were getting married, the airplane ornament that is a secret joke that we always laugh about, etc. The tree doesn't look like something in a magazine, but it's our life, and it's beautiful! Perhaps thinking on it like that could help?
We do get 1 ornament a year for each person. It adds up, yes. I'll keep them all anyway. As they get into highschool, IF we think the tree has too much, perhaps we may let the boys choose which of their ornaments they hang up. Who knows? The doofy angel made out of a styrofoam cup with yarn, glitter, pipecleaner halo, and paper wings might be sentimental to him more than something nicer. No way of knowing. But I'll let the kids choose: "Ok, we can put 20 ornaments from each person's box on, you choose what 20 of yours to put on, and why?" Something like that. Because it is about them, and I want to celebrate them and our time together while they're still with me. At some point, they're going to grow up, get married, and do their own thing, and I will miss the silly styrofoam cup angel.
If you don't have "personal" ornaments, and it's just a set of balls or whatever (that's what we call filler), perhaps you can just donate them? There are ALWAYS people to donate the generic things to. We had filler ornaments when we were a new family and hadn't "collected" enough personal ornaments to fill the tree, and again last year when we were in a temporary apartment and our real stuff was in storage. This year we donated that tree, lights, and ornaments to family that was in need. Then while leaving Walgreens one day, I heard a lady asking if ALL the trees in the parking lot were $35, and then saying no thanks, it's dumb, I'd still have to buy ornaments too. She had a very young child with her (almost 1). I had to chase her down after putting my kids in their seatbelts. There's lots of people who could use the filler ornaments you don't want, (balls, garland, whatever), and maybe you could start working on a tradition where you buy or make SPECIAL ornaments, just one at a time, for you guys?