
I don't use ratings but I use colors, Mainly because I can name them. I like doing this because then i don't have to have separate playlists, i can do 1 playlist and break that up by colors
for me as a mobile guy I have some colors labeled as "Open main room" "good" "club" etc..... all the dance tracks then are in one dance playlist and I color them based on that, then when i load up the playlist on the nexus, I hit sort/color and "open main (pink color) is at the top for the beginning of my parties
hope that helps you out and others reply too, I am always interested in hearing how people organize also