Making slave Leia into a Sith lord turned out remarkable for this cosplayer. That's what I love about cosplay: you can be anything or anyone. The only limitation is your imagination (and possibly your budget and/or sewing skills). Which do you prefer, Jedi or Sith? I'm more Gray, personally.
I really like coordinating couple's cosplays. And it doesn't get much better than Star Wars. These two costumes, a bounty hunter and a Twi'lek, are great and seeing outstanding cosplays like this is a huge reason why I enjoy going to conventions. What is your favorite alien race from Star Wars?