It would be excellent if one could define that a profile is inherited from another one.
For a specific use case:
I have a bunch(!) of Drupal sites that all have a lot of common characteristics (*.module, *.install, *.info, ... should be sent as ASCII, for example), but most of the sites also have some unique settings (if nothing else, username and password). It would be grand if I could specify a "Drupal" profile with the proper settings (possibly inherited from a generic "Website" that covers *.txt, *.htm/l, *.css, *.js), which I could then base new sites on.