The scene where he is talking to the Avengers and crushes the other Suit/robot head. Gave me a Terminator 1 feel with it appearing to have ( could be wrong of course) practical effects. Either way that really sold it for me.
I don't Understand why people like Tony and others view that final scene as ' he had to kill Zod to save the 4 people? could he have done X to stop him? etc" That was not the point , it was a matter of not just saving those people but if he did. Zod would move on to others and never stop he would go after more . He was a mad man that had everything taken away from him and was on a rampage ( BTW i am pretty sure Zod considered it a suicide mission as well ). Zod did not care what got in his way and was just as powerful as Kal. Superman knew that ..and because ( this is another thing I feel people are not picking up on) now being Superman is new to him and his only option to capture Zod was gone. He knows in those moments he can only over power Zod so long . This battle was going to go on forever and more people regardless were going to end up dying. No place on earth is available that can hold Zod..so being inexperienced and pretty much scared for the humans he loves. The only choice he had was to take him out. Also the choice he made was very much a human reaction even if we don't want to believe it. Also I am hoping that if this Superman is going to be allowed to grow as a hero from the events that took place will allow that. And even may bring about that stronger sense that killing is not the way it will still dwell on him. that he needs to find another option..
Well that is my 2 cents on the matter. I am super tired so if some of writing seems off its that and I don't post a lot of stuff.