The galaxy of "Star Wars" is full of countless characters, each with their own story. So why do fans keep gravitating back to the same ones? This is doubly true for droids, which are robots literally mass produced in factories that often develop quirks that go beyond just mere programming. Not that you'd realize it since droids like C-3P0 steal the spotlight. A droid can be underrated for any number of reasons. Some of these robots play a pivotal role in the story but have so little screentime they're overshadowed by other droids of admittedly equal-or-superior importance (looking at you, R2-D2). Other droids started existence as little more than set dressing but received exciting expanded stories you can only find in the aptly named expanded universe of "Star Wars" media.…