I really like how Amarok has a dynamic scoring system for my listening habits.

What I think would be awesome is if there was a feature that would convert the the Amarok score (1-100) into a "star-rating" that could be saved to the music file's ID3 tag.  Perhaps something like this:
01-20  = 1 star
21-40  = 2 star
41-60  = 3 star
61-80  = 4 star
81-100 = 5 star

As manually editing each tag myself for thousands of songs is crazy.