I'm not sure how this got so sidetracked so quickly. Yes, River Tam was a wonderful, nuanced character with depth. Yes, excellent stories can be told with robots as the main characters. Yes, it's possible for robots to be other than inhuman. Yes, Star Trek has had more time to explain more themes than the Terminator franchise. Yes, the Terminator franchise might, at some point in the future, explore these themes. Or, then again, it might not.
But none of that has anything to do with the point I made. Or the point I thought I was making, at least. Which is that I have seen Summer Glau in exactly two roles, each of which has been an "inhuman killing machine" (a phrase I chose carefully to avoid words like "robotic", "soulless", "emotionless"* or "android"), and I would like to see her in other roles, because I'm interested in seeing if she can act like a human. I suspect that she can, and I suspect that the evidence is out there (after all, she has played more than two characters), but I'm simply not familiar with it. I'm sorry if I lead anyone to believe that I thought there was anything wrong with the roles she's had so far.
I think it's a shame when any actor gets typecast (especially in so narrow a role as this), and deserves a chance to show that they can do something different. The more different the better. Some will, of course, fail; to quote Vittorio De Sica "There is one role anyone can play: himself".
But, honestly, I liked both Firefly/Serenity and The Sarah Connor Chronicles, not least because of Miss Glau's perfomance. Is it really so wrong of me to want to see her in more diverse roles?
*OK, I added a little snark on the end which kind of undercuts this point, and for that I apologise.