I'm largely the same with the exception of music. I don't use online music services, and have had the same (growing) collection of mp3/m4a/flac files since the late 90s. I have a few custom tag fields that I maintain in an ad-hoc fashion. First, I'll add new music to an inbox and give it a few listens. If anything jumps out at me I'll give it a rating, and maybe add some tags under 'mood' and 'instruments'. And that's about it. It doesn't have to be perfect and it doesn't require a lot of time. Maybe I'll spend 30 minutes a week going through my recent play history tagging specific tracks that I like.

It's nice to be able to put on "uplifting saxophone" or "dark dramatic piano"