My experience differs from yours. Most, if not all of my e-books have been PDF. They work fine, and look absolutely great both on my PC, and my e-book reader. Epub and mobi on the other hand are horrible for medical books, for one.

Most importantly, my point is being ignored. I could have used epub instead as an example. It is irrelevant to the point I was making. I am not interested in a war over e-book formats.