For a maximum ease of use and simplicity, (in my opinion), for DVDs and audio
CDs, when right-clicking on the media icon on the desktop, the menu should offer
"play media" instead of, or additionnally to "open".

The reasonning is that almost nobody wants to see the VIDEO_TS and AUDIO_TS on a
DVD, same for an audio CD. The application to launch should be the same than the
one launched automatically on inserting a CD/DVD (dialog "drives and media
preferences").

A user who would not know which application plays DVDs/CDs would have to eject
the media and reinsert it, counting on the "autoplay" feature of GNOME that will
launch the appropriate players. That would be the case for the common case of
booting with the media already in the drive; then the autoplay wouldn't be
triggered.

I submitted the same bug for the drivemount applet, too, bug #308388.