When I do a piece and I'm pleased with it, I'm not so concerned that it runs. Of course, I would prefer it did, but the fact that I made the deadline and solved the problem I was asked to makes it a great opportunity to demonstrate my value to a client.
Onto the next one...
Today I received a call to illustrate a clown.
I hope it's not clown week.
Finally, the choice to go with a different cover was a sound one and given the two images, I would have gone with the current cover as well. Infants are cuter than adults.