I've posted a review to my LJ of every movie I've seen since July, and tonight I took the time to go back and give them all star ratings. I intend to keep this up from here on out as well.
My movie reviews: http://www.livejournal.com/users/radven/tag/moviesRatings Explained:  
5 Stars - A classic. Everyone should see this movie!
  
4 Stars - Worth going out of your way to see. Pay to see this in a theater.
  
3 Stars - Worth watching, but no rush. Add this to your Netflix queue.
  
2 Stars - No need to avoid this, but don't go out of your way either.
  
1 Star - RUN AWAY!