Brand new user to MediaMonkey. I have an extremely diverse collection of music, extending from Classical Organ music to punk rock, musicals, video game soundtracks, recordings of piano rolls ... yeah, it's pretty wild. The big library is a convergence of 10+ years old .wma, Apple Lossless (when I was convinced iTunes was a good way to rip lossless), but now Win 10 directly supports .flac, and that was the tipping point to ditch iTunes (yay!) and manage all these different file types in a single interface. I don't plan to use MM to play files back very often, I have Sonos and Plex to actually play the files, so MM is in the picture to cleanly manage, catalog, and organize everything for me. It was the tipping point to basically buy into Gold blindly and just take off running with it. Well, that and the critical features aren't available until Gold is unlocked, so there's that.
ANYway, I feel compelled to build separate collections for some of these things, like Holiday music can be in its own collection, then appropriately tagged for genres (Sonos indexing doesn't extend much beyond Artist, Album, Track, Genre, basics), maybe another like "All Things Video Games" in another collection, Roll Recordings in another ... but I'm very curious, what have other users here done to best manage diverse collections? I don't want to split out the file structure too much if I can help it, and I know MM can be "infinitely" customized, just looking to get some ideas before I create a bigger mess than I ought to.

FWIW, I've also got video media such as TV episodes and Movies that have been ripped from their discs. Soon I would like to see what MM can do for video file organization, but right now it is pretty clean (thank you, Plex), so cleaning up the 21,000 some odd audio files would be the most important thing to accomplish.
Thanks much!
--Micah