The stormtroopers of Star Wars are somewhat of a paradox. They're the "bad guys" as soldiers of the Galactic Empire and then the First Order, but fans love them. They were named after the German shock troops of two world wars, and their look is designed to be uniform, mysterious, and menacing, yet fans pass up no opportunity to portray them (and dance or do good deeds, like in the 501st Legion).
Much of the stormtroopers’ appeal lies in their mystique. “It’s almost a paradox,” says Laverty. “The suit is inherently cool because it allows us, perhaps forces us, to project. All we have to go on is a reflective visor and the raspy, disembodied voice of the wearer.” That visor makes them easy to dehumanize, which has a handy side-effect for Star Wars’ role as a children’s movie. Since they’re portrayed as a disposable force of anonymous goons, we don’t have to feel bad when the good guys kill a stormtrooper.
And a lot of stormtroopers are invariably killed by their own ineptitude. There are a lot of factors that go into the way we see stormtroopers, which you can read about at The Daily Dot. The article includes a history of stormtroopers.