Ultimately, every roleplaying character is a Star Wars character
Darth Vader - Darth Vaders are fairly common in experienced adventuring parties, usually found amongst players who've tired of playing Chewbaccas and are more interested in directly seeking their own fortunes, even at the expense of fellow party members. While they're easily kept in check, the Darth types will occasionally get out of hand, especially if powerful magics are involved. You can bet that if there's a magical sword or piece of armor lying around, the Darth is not going to let anyone else in the party get their hands on it. The typically Lawful Evil Darth types don't get along well with Leias, because they're so domineering and will gradually take over leadership of any party they're a part of, but they're respected (if feared) by Lukes, Obis and Landos, because all three of those respect the Darth's power and capability.