I've been on the lookout for something few have thought of: a music library manager that doesn't use id3 tags.
The reasons I actively hate id3 tags include that they don't include character encoding info, and by living in a non-latin1 country, I was really fed up with them after a short while.

(Another reason is that due to continued exposure to an IT major at a technical university, I have developed a pathological phobia of unnecessary redundancy.)
So which music manager can be set up to sort music by parsing filenames with a regexp? (I have real long filenames, like "Rammstein - Sehnsucht - 03 - Tier.mp3", that is "Artist - Album - track - Title"...) It should be easy.
No, Amarok can't do it.
Yes, I know it has a setting that looks like this.
It would be nice if it could.
...
But it can't.
