Eh, I need more convincing. I see your point, but that doesn't really put Vader in a "bad *** light", does it? He actually looks pretty stupid and pathetic (and that's discounting the prequels, imagine if we included his original whiny ***** persona that killed a bunch of kids!)
Dudes like Han, Lando, Boba Fett etc. could act out their most base desires without becoming someone's "dark b***h". This light side/dark side, Jedi/Sith thing is sort of dumb the more you think about it. I think Luke had the right idea, balance. Why not choke a couple of Gamorean guards for fun? Why not be a good guy that fights oppression and tyranny?
Yoda and Ben have some great life lessons in the first two, but when it comes to ROTJ, hmm, I'm not sure. The story "logic" seems ****ed.