lordjedi said:
I doubt that Luke would have killed everybody willy nilly. That would have truly been something of the dark side. No, Luke was only going to kill the people that were attacking them. If you notice on the sail barge, I believe Luke lets a few of them run away because they aren't attacking anymore. If he were hell bent on killing everyone, why let those few run away?

Yes, but you forget that, even if he did let some of them run away, he did end up killing every single person when he blew up the entire sail barge, something that really wasn't necessary. Anybody who did manage to run away got blown to bits.

All those comments about it being a possible dark side flirtation... that's actually really cool. I doubt Lucas intended it to be interpreted that way, but, wow, if that had been the case, I think ROTJ would have earned so many points back that it had lost. First of all, the Jabba stuff would actually have some relevance to the rest of the plot and strengthen what was already a Luke-centric movie by heightening the danger that Luke might turn to the dark side.

As for what his clothes meant, I do recall reading a quote somewhere from Mark Hamill that said that George showed him that costume stating that it was representative of the Jedi garb of old.