You bring up a good point: it would be nice to be able to quickly see what options are different from defaults, whether in graphical or text form. I don't know

You bring up a good point: it would be nice to be able to quickly see what options are different from defaults, whether in graphical or text form. I don't know of any UI (for a desktop environment) that does this, however, but I do like the idea. I do believe I have seen this kind of thing for more specialized products or programs. I will point out though that with Linux desktops, the defaults are different by distro, though still this shouldn't matter; it shouldn't be that hard to have a "master" config file and then be able to diff it, or have a UI panel that does this in a more user-friendly manner.