1) I agree about the triangular slider
2) I think it would be helpful to "group" the ratings scale, but keep it simpler (5-10 setting). People who LOVE (hmm... we'll say) The Ramones, think REM and Radiohead are fantastic (or love in lowercase), and really likes -maybe- 2 songs that WuTang put out 8 years ago but doesn't want recommendations from WuTang, yet doesn't want to say "they suck"
SO
maybe just a visual grouping of the ratings - 1 2 3 4 5 6 7 8 9 10
where 1-3 mean "yuck"
4-6 mean "don't suck, but not really looking for more"
7-9 mean "I like 'em" -to- "I luv 'em"
and 10 is "OMFG I WANT TO BEAR THEIR CHILDREN"
that way a person can say they really like stuff, but a band has to be super-special to get that 10.
"It's no measure of health to be well adjusted to a profoundly sick society." Krishnamurti