artists alphabetical (numbers go before A) according to last name, then first name
there is a category various artists that goes in at V.
within artist, according to recording date of the first date on the disk.
boxed sets are kept in their own order are put in jewel cases and are integrated with the rest.
should it get out of hand moving it all when new purchases need to be put in their rightful place, I will opt for eiter chaos or order of acquisition. Each one will get a number and there will be a catalogue to allow me to find things. The latter works well for classical BTW, where you often have various composers or performers on one disk.
Either way: there is serendipity and serendipity rules.