Suggested songs smart playlist
in the old days, Amarok used to have the very nice feature of "Last.fm suggested songs playlist", where it populated a playlist continously, based on Last.fm's "suggested songs". This created a very good playlist from your library, based on audioscrobble database statistics.
This is discussed in this post from 12 years ago from the Amarok 1.x scripts page.
I never understood why this feature was removed from Amarok... it is like the Genius playlists from iTunes.