Similar situation here: ~23k songs, meticulously tagged, no playlists.
However, I'm a little different in that I end up listening to the same handful of artist/albums/songs for a period days or weeks, then move on to something else.
I definitely get in moods where I listen to a particular album a lot in a short period of time too. I try to vary my listening but sometimes there's just an album that feels right for the moment.
However, I'm a little different in that I end up listening to the same handful of artist/albums/songs for a period days or weeks, then move on to something else.