I posed a question sort of related to this thought at Perlmonks, but this space is my little soapbox, so I'm gonna step on it.
I pledge to rate at least one module I use each day on CPAN Ratings! (Until I have rated all the modules I use.)
I challenge everyone else to do the same.
I don't pledge that I will have anything insightful to say about the module, and I wouldn't have a review text at all except that it's a required field. But I will rate the module 1 - 5 on a combination of how I 'feel' about it, how easy it was for me to use and how helpful I found it.
Why? Because a statistically relevant sampling of the modules in use, and a comparison of which are more used, is just as important as insightful reviews of modules. Seeing 5 stars with 2 ratings is less meaningful than 4 stars with 50 ratings.
Whether you dismiss this as 'popularity', it doesn't make the measurement unimportant. Things that are popular are popular for a reason. Things that are widely used have larger support bases (an important consideration in the opensource arena.) Companies and employers like statistics that back decisions.
But for that kind of data to even exist, more people need to rate the modules they use, whether or not they have a useful review of the modules.
If we don't want to use cpanratings.perl.org this way, it should be called 'CPAN Reviews'.
Update: diotalevi has requested comments on his submit-cpan-ratings script that aims to facilitate more ratings and reviews.
