Next to my DVD and VHS library, I also have a reasonably large book library.
And you know what? Almost no two books are the same size. Only particular sets or some specific "brands".
And they're even made of paper (exposed artwork) and cardboard: and most of 'em in excellent condition.
I never understood why all DVDs *must* be equal. I liked the snappers very much (for various reasons) and thanks to the bitching on the 'net Warner dropped those fine cases.
I must say, those actor set (the ones with a big photograph) are very interesting, and the way I decide to buy a specific one or not is like this: which of the movies in the set that I don't own already (or a poorer version) do I want. If there are enough of those (or perhaps only one I have been looking forward to) especially: it's a buy.
The casing plays no part in this. Even the 'Ford at Fox' case (huge, heavy), which I cannot even store in a normal way in my new HT (

), was a no-brainer.
Those Warner actor-sets get a nice place on one of the special shelves (also sized to accommodate the Disney tins) in my DVD cabinets.
So, although I hear those people who want to build their DVD storage differently: I cannot agree with them personally. And I don't think studios should listen to those alone!
If cutting a few corners package-wise can make the sets more profitable to the studios - and thus increase the chance of us getting more of those sets - I'm all for it.
Cees