The only reason I stick with WAV (actually 2) is because MC handles WAV so well and keeps all my "tagging" in it's own system. I was less concerned with it actually being stored in thefile itself.
the other and main reason I've not just bulk converted the library to FLAC is my Denon AVR which I made on investment in and it does not support flac and converting on teh fly from flac to WAV when browsing is a horrible user experience.
OK, menu's. Due to differing music tastes and each not wanting to scroll through each others music, I have tagged all the music with names using the "usage" tag.
i.e. Bob, Jane, kid's
Then under the Music root library item I have a user library item with a display filter for the name
i.e.
Music > All
> Bob
> Jane
> kid's
After that I have the typical library items for browing the music my Album Artist, Album Name, Song title, Genre etc. after each user.
i.e Music > Bob > Album by Name
> Album by Artist
> Song by Name
> Song by Artist
etc.
As MC is really the Library manager and backend to the house system, I have this view scheme setup for the Web Remote and also under the DLNA server.
This way all the music (and photos and video/movies) is contained and managed in a single library, but each user is not exposed to content they don't like as they each have there own
Maybe not the most elegent, but passes the usabilty test and doesn't cause me a masiive operational overhead.
Anything I want to appear in multiple vies, I just comma delimit in the usage tag and voila, the few artists we have in common, appear in both
This customization of the menu's (view schemes) that are presented to the users via DLNA and Web Remote, along with MC's library management, is why i have invested so much time organizing and tagging the entire music and video collection. One day I'll get to the photo library (but that is a VERY different problem)