Issues in Alphabetizing

[BWOzar]

I'm curious to hear how people alphabetize or sort their collections when it comes to movies that don't really have a clear sorting location. I like to keep my Blus alphabetized but sometimes it isn't quite clear how to sort them. For example, I keep the 5 Harry Potters, The Mummy, POTC in story, rather than alphabetical, order but I have the 007 movies and Jack Ryan movies simply sorted alphabetically. So what are people doing with Chronicles of Riddick and Pitch Black? Going by that DVD-only added Chronicles of Riddick header on Pitch Black and sorting it that way? Separating them out?