I would talk to your FH and decided what items you may want to upgrade in your house. You said you have a lot of projects, if you are remodeling or redecorating, this would be the perfect time to get those items. Otherwise just let your guests know that you are looking for gift cards so you can continue fixing up your house. I agree that you should not go behind your FH's back and register. You two are bound to be together when someone asks you about where you are registered or something about your registry. Maybe suggest some items for the registry that your FH may like.