Organizing books

So you have a bookcase.  How do you organize it?

I must say that I do not like the arrange-by-color trend:

My inner organizer (yes, it's in there somewhere, though buried a bit deeper than A.'s) hates the thought of organizing them by anything other than alphabet or subject matter, or both.  Plus, I just don't like the look of rainbow books (though I do like real rainbows).  I like the way the spines create a perfectly random scattering of color when organized normally:

I admit I do like the way literary French books, which are predominantly white, have a creamy minimalist uniformity to them—but in this case it happens naturally.

 
Nothing, however, could be worse than forgoing all organization like this:

Yes, the books are backwards.  It's like saying "f*** you, books, I'm never going to read any of you.  I don't even want to see your faces."  How awful!  I guess there's nothing wrong with using books purely as decor, but it seems quite soulless.