It got me thinking. It would be handy for a user who uses several skins to be able to save a custom hints.jap for each skin without having to edit the file manually, which can be confusing if you're not familiar with the skin's variable names. Installing a new version of a skin also overwrites that file.
The file, e.g., userhints.chameleon.jap or userhints.fotoplayer.jap, would be called up whenever the user chose that skin.
I've come to think that this is more important than I used to believe. It should be implemented by the possibility for the user to create a defaults.jap file in each skin directory. So, there would be one "master" defaults.jap, which selects the skin for new projects, but also a defaults.jap at the skin level so that when the user selects that skin, it comes up with his preferred settings.
BTW, I already really like this feature! This allows me to set my favorite settings for the various skins I use when testing. Minimal for instance now defaults to showing file names and Turtle always uses hidpi images. It's embarrassing it took so long cause it was easy to implement.