With formatting a printed book, you also have to keep in mind to add features you don’t need for an E-book, namely a header and footer. When you do research in books from your own shelf, you will see that there is a great variety in where page numbers go or even if all pages are numbered. Sometimes the header will give the author name, book title or chapter title.
Ultimately, all of these little decisions like where to put the page numbers are a question of taste. But also keep the reader in mind and think about which format provides the most comfortable reading experience. For example, is it really necessary to have the book title on the header? The reader probably can remember what book they’re reading. So keep in mind aesthetics should not be the only factor but also the reading experience.