This is very much done out of a proper response to the question asked by @curiousnorway
Now I've already said that they don't but the costuming of Star Wars has a lot of thought put behind it and the outfits often are a reflection of the character.
Lets start out with the Jedi, the Jedi are in many ways a Space Samurai mixed with a little Buddhist monk.
The Jedi and their costuming often reflects this,
They are very clearly inspired by the robes of the Samurai
and now for the side by side
Now then lets look at Han Solo. Han Solo the Gunslinger, the character who if not created then at least codified the Space Cowboy Archetype.
Its not a coincidence that his clothing is almost identical to the clothing worn by Will Kane in the original high noon.
Now Darth Vader, the right hand of the emperor, well he clearly fits the archetype of the Black Knight like a glove.
With his evil laser sword, his all black armor and his deep voice.
Now Princess Leia? well her outfit is rather self evident
She is a princess, she wears a princess like dress-y thing, and her most famous poses always see her holding a blaster to show that she isn't the normal damsel in distress. Also R.I.P Carrie Fisher.
The Emperor really fits the evil sorcerer overlord archetype and as such he wears the robes of an Evil Sorcerer
this is just the tiniest fraction of the costuming of Star Wars and I may do a part two of this