This might be cos I've drunk too much nice red wine tonight, but your suggestion of rating things from 1-10 reminds me of rating risks of doing a particular programing task (hmm, risk management). I prefer a scale of 1-5 cos it's coarser and less arbitrary, and I prefer to have descriptions for each rating. For a task with a requirement and available skills, the following descriptions might apply - what score descriptions would you use for a tv series or a movie? 3/5= average? What aspects of the film do you tend to consider?

For risks for a technical task (which is where I finally started relating risk management to software projects):

1: "Activity has been done before; Experienced people are available to complete the activity."
2: "Activity has been done before; People are available to complete the activity."
3: "Major parts of the activity have been done before; Experienced people are available to complete most of the activity"
4: "One or more major parts of activity have not been done before; Experienced people not available to complete most of activity."
5: "Activity not been done before; Tech not readily available for activity; Little experiecne in this type of work."