@MosquitoFarmer - Hollywood always tends to humanize its talking creatures. It's always off when someone can say words without having lips (although understandable in the case of a robot)

@JustALurker - I have to admit that Ultron was scariest in his introductory scene using the busted Iron Man robot. But he had more personality in his later forms.
And I guess his final confrontation with vision was meant to give us the classic Ultron look.

@THEDARKKNIGHT1939 - Here's the thing: Ultron is a robot AND a CGI character, a character, in this version, that wants to create new life. Robots, by definition, are only meant to mimic human life. That's not what Ultron wants to be in the film. Also, the reason why the Darth Vader moments can even remotely work is because 99.99% of the time his mask is used to strike terror, so they can afford to use a suggestive shot as such; if they did all the time, it would get old, in fact they don't do it a lot for the Mandalorian. And again, it's all based on character, right. The Mandalorian can't show his face due to the creed. And even then, I will say it restricts the performance an awful lot. That show wouldn't work without baby Yoda alone due to the restrictive nature. I think the context justifies the changes. And, people don't notice this an awful lot, but deviations from the source material are an inherent part of the MCU experience. I don't think there's a single smart storyteller out there that would make ultron not have human features. I just genuinely can't see it. However, I'm open to being wrong, the only reason I feel I have an argument is because most of the complaints seem to fall under "not comic accurate", which is stupid imo.

@ScarletWarlock - I think his first appearance was his scariest scene in the movie tbh. Plus, the CGI is on them. Ultron's look could have been perfectly achievable in with a suit.

@ALF9001 - Also when he has the best piece of dialogue in the whole film. Do you really think they would be able to do the scene where he chops off Klaue's arm the same way if he had no face. "Do i look like Iron man to you? is performed with seeping rage. You just can't do it. Whether or not Ultron not having a face is the best scene is irrelevant to my point.