There are patterns to be found here, of course, even though I rarely shelve all of an author's works together (even 2-3 together does not a complete collection collation make). There is a reason why the books in the second photo are shelved the way they are. Can you pick out the reason?
Also, I find myself curious about the collections of those who are reading this post. If you have links to photos to share, please feel free to link them in the comments. I, for one, would love to see how others go about shelving their books.