I was actually thinking about this quite a bit this morning... like what specifically bothers me about assigning numerical values to work? I don't think we should go around assigning numbers to works of art or human beings.
It's like that old saying... "there's lies, damned lies, and statistics." It would be nice if everyone gets at least 10 ratings so they have a value of n large enough to be statistically significant... but it sort of doesn't matter.
I'll try and get you a rating soon, because I can see its something that's important to you. I sincerely hope that it is a useful reward signal.