My gripe is specifically with people who can't imagine AI being anything but evil and hostile because that's how they view all relations between people with power disparities. I'm fine with Skynet; It was used in a creative way to tell a good story. Thematically, Skynet was always a weapon, a cold war era strategic warfare AI designed to kill humanity that just went a little off the rails. It represents us turning on ourselves, rather than AI in abstract.
Likewise, I'm okay with HAL, at least in the novels, because HAL has an understandable and even sympathetic reason for turning on the crew; He was given contradictory orders and, being a computer must carry out the instructions he is given. Unable to reconcile the contradiction HAL goes a little nuts. It's not HALs fault, it was the callousness and carelessness of his handlers. He didn't want to hurt anyone, but he was put in an impossible position.
But Mass Effect? The Reapers have to kill all humans becauase humans and robots can't be friends becaues? I hate that!