I'm pretty sure this is how my jewel cased games are sorted:
I have Arcade Card, bicompatible, and demo CD games at the top of one CD rack. Then Super CD games go downward in order of RPG'ish: War Sim: Actiony arcadey non-shooters, shooters, digital comic/adventure and then misc.
The shelf to the right is Turbo CDs up top, first SCD (d
sorted by spine color?), then CD2. Beneath that are PCE CD2 in the same kind of genre order.
To the right of that is TurboChips up top. Orange spine first, then the rest sorted by color. Beneath that is the few CIC PCE HuCards I have left.