My wish list for Mp3tag, just off the top of my head:
- Show and hide columns with a right-click checklist menu, like in Windows Explorer.
- An option to 'Select all files' when Mp3tag is opened or when the directory is changed.
- Customizable button bar. Show, hide and reorder buttons and dividers.
- The ability to define new buttons in the button bar and to attach the buttons to tools, action groups or sets of action groups.
- One-half and one-third width definable user fields in the Tag Panel that can be layed out side-by-side horizontally, similar to the layout of the Year/Track/Genre line.
- An option to make the Comment field in the Tag Panel multiline.
- ID3v2 tag editing in WAV and AIFF files.
- Cleaned up, stricter syntax in scripting and filters. Require the use of quotes (or double quotes) around string constants and require the use of dereferencing charactorers (always %artist% when referring to the contents of the ARTIST field.
- The ability to toggle between mapped field names and raw field names, perhaps only in the Extended Tags dialog.
- A total reworking of the system for removing tags. I don't know exactly what would better, but the current system of defining what types of tags will be read, written and removed is awkward and unintuitive.