Sometimes I will make an ATC and decide that it isn't much of an ATC by itself, but that it would make a nice focal point for a card. Three layers later, I have something I like much better. Anyone can add layers to a card; the trick is to make the layers look like they are adding something besides weight.
Does this ATC/focal point look familiar? I was testing the composition for this ATC on a bit of scrap paper before using it on my heavily techniqued background. I like to test out parts of an ATC before I put it all together.