I'll differentiate between the two Terminators by referring to their model numbers, T-800 and T-1000. And yeah, I found myself referring to them as "he" instead of perhaps the more proper "it."
BTW, this evening was the first time I saw the extended version. It does more for explaining character development of T-800 than what I'd seen before.
- T-1000 seems to only show emotions during interaction with humans, and tones it down when he isn't looking for cooperation.
- In the first chase scene, how did T-1000 catch up to John? It's funny how the truck just suddenly came over the side of the bridge.
- T-800 figured out the real request behind John's question of if he had any quarters -- rather than saying "no" he figured out how to get some quarters for John.
- T-800 showed no emotion on his face when imitating John on the phone.
- T-800 may have shown his first signs of emotion in the form of irritation when John said he had to rescue Sarah. I was going to dismiss this as my imagination, but my mom also commented on it.
- John insisted that T-800 swear he "won't" kill people, and T-800 turned into "will not"...not sure if this is significant, but it's interesting.
- T-1000 apparently has to slow down some to recover from injuries.
- T-800 thought that crying was something wrong with the eyes. Odd, considering the files he should have about human behavior.
- After the switch was reset for T-800 his facial expression looked a little off after. I'd have to see the movie again though before commenting more on it.
- "It's in your nature to destroy yourselves." Dangit, why does T-800 have to say something that seems so accurate about humans?
- John stresses to T-800 that he needs to learn and understand about emotions. Maybe this shapes T-800's behavior?
- Why doesn't Sarah kill Tyson??
- "The history of things to come." Just a cool line from Sarah.
- T-800 tells John that war could be prevented if Tyson's work is destroyed, but in T3 the T-850 model Terminator tells an older John that it could only have been delayed.
- "We were in uncharted territory now, making up history as we went along." Just another cool line from Sarah.
- We get shown how T-800 sees things often enough, but never how T-1000 sees things. For that matter, we don't see them through the T-X's eyes in T3 either. Why not?
- Why did John need to get fancy with getting the key when they go to blow things up? Couldn't T-800 have just broken in and gotten what was needed? Or did it require more finesse than that?
- T-800 refers to T-1000 as "him" rather than "it."
- T-1000 shows some expression (horror?) at being frozen. We see more apparent emotion(s) at his final death/termination.
- T-800 is able to reroute his power source, even after it was apparently shut down and no longer functioning. The T-850 does something similar in T3.
- "I need a vacation." Said by T-800 after terminating the T-1000. I think humans may have been a bad influence on him. Bwahaha.
- T-800 apologizes to John for the necessity of himself being destroyed. He also tells John that he understands why humans cry...this leads to TONS of questions.
- T-800 goes through with allowing Sarah to terminate him despite John's orders not to do so. I thought T-800 had to follow John's orders? What's up with this?
- Sarah says that T-800 learned the value of human life. But did he (it)?