I agree with the sentiments about love-hate. I'd love to see more, too, but history has shown that were Cameron is not involved we get poorly concieved doggerel.
Plus, they can't do much with real terminators, as that screws with the continuity of the universe too much.
The final thing that I think would drive me nuts about the series is that you get to see Conner go from the young, head-strong, emerging leader he was at the end of T2 to the whipped, gutless wonder he was at the start of T3. No thank you.