I will begin by saying that what I'm about to describe is a lovely problem to have. Should we be so lucky in life if this is our "biggest" problem.
That being said, we live in a small studio apartment with not much room or need for stuff. Our mothers' requested that we register for stuff so that their respective friends and family would be able to buy us stuff. We did so several months ago, (upgraded kitchenware, appliances, new dishes, silverware, towels, etc), and most of the items have been purchased. We added some more stuff, and one of the mothers bought a large chunk of it-- very generous, but very stressful, because now, we have to add... more stuff... that we don't need. As it is, the items we've received are stacked in the precious little space we have in our apartment.
We don't want to do a honeymoon registry-- not because we have any feelings one way or another, but because other people do, and we don't wish to offend anyone. But the simple truth is, we are two people in a studio with a small (expensive!) storage space that doesn't have much more room, and we are still like, 50 "gifts" short for people to buy us. (Again, not OUR wish or desire or expectation, but let's face it, everyone else's...especially with this particular group of people.)
Someday, we will have a larger apartment, and will likely need some more stuff. (Like, a new couch, dining room table, bed, etc.) But we don't have the need or room for it now.. and how much kitchenware can two people who rarely cook, have?? Frankly, it's just so freaking stressful.
We've registered for several "experience" gifts, like dance lessons and cooking classes. And also added charity registry. But that category of creative gifts is pretty exhausted now...
Is there a graceful way to say, thank you for the thought, it's really very generous. But we simply don't have the space or need for any more things right now. We would be very grateful if you wanted to help us with a gift card to Bed Bath and Beyond, or Bloomingdales, so we can fill out our home when we have more space ... Or is that 100% tacky??!