My favourite ones are the original making of's (making of star wars, SP-FX, Classic creatures & from star wars to jedi) and of course Jambe Davdar's Star wars docs trilogy. I wasn't over keen on Empire of dreams. One thing i hate about these new style docs that seem to be the norm nowadays is all the useless chatter from people who had absolutely nothing to do with the movie, or ones that is just some talking heads with a few clips from the movie with no behind the scenes material at all.