The box for School Days HQ was a little too humongous for my liking. It literally will only fit upright on one shelf in my house. With that said, I’m kind of cool with it if Shiny Days is the same size. There’s something to be said for symmetry in these things… And at least it beats the heck out of Graduation '95. I kid you not, this enormous flipping thing contained nothing but a CD-ROM in a paper sleeve, haha. As a civilization, we have come a long way.
I really thought the size and style of box you used for
Starless and
Littlewitch was stellar for a large-box limited edition. They’re big enough to be visually impressive, but small enough to be pretty easy to store. I also liked that
Starless had a paper “fitting” to hold the Amray case still, which was a subtle but appreciated improvement over the
Littlewitch box.
In terms of true personal preference, though, I think my tastes echo SwiftTalon’s: “take up the least amount of space when on display, yet feel like quality in your hand and also house all the extras well.” I would actually point you toward a certain anime company’s boxing style as my ideal for limited edition boxes: while their bells and whistles are often lackluster, the outer package for Funimation’s “limited edition” Blu-ray/DVD combo sets are basically perfect. They come in a colorful sleeve box that allows for really pretty cover art, the chipboard casing is super-solid and durable, and it fits anywhere you could store a standard Amray DVD case. In your case, you could use the extra room for either an artbook or a soundtrack disc. Take a look below for reference (vis-a-vis an Amray case):
In the end, the takeaway is that I’m not a fan of huge Japanese-style boxes. I do like artbooks a lot. Soundtracks are better still. I think you could do very well by sticking to the size of boxes you have with
Starless and
Littlewitch, but I’d encourage you to go smaller rather than larger if you make a change. Hope that helps somewhat!