With standing structures, there is much more room for uniqueness. They have a large base upon which there is plenty of room to decorate. They also leave room on tabletops so that the decorator has more surfaces to work with for picture frames and trinkets. There is also not the burden of worrying if a table is sturdy enough to support the decoration.
If you look for pre-packaged shelves and just cant seem to find any that go well in your home, you may need to take another route. This would involve doing a bit more shopping on your part but what woman does not love shopping anyway, especially when you are doing it to beautify your home. You might find that you will have to buy the shelves separately from the brackets. You may decide that you would rather go this way even if you do find that the other ones are nice.