One of the wonderful things about self-publishing is having complete control over the end product, especially when it comes time to alter your cover to reflect the editorial reviews you may have received during the first few years. (Of course, if you traditionally publish that might be months rather than years.)
I just completed the cover revision for It All Started with a Bicycle, placing a short blurb on the front, and three longer ones on the back. Looking at the book now, it really does look like any other book out there. This is an exciting moment for me!