I watch very little TV, other than movies. The last TV series I enjoyed and watched on a regular basis was the re-imagined Battlestar Galactica, about the conflict between humans and the robotic cylons that they created (and that rebelled against their creators).
Sci-fi generally gets little respect from the intellectualoids, but that was one darn good, thought-provoking, intelligent TV show! It raised so many questions in your mind:
What does it mean to be human? Can a machine be alive? Is technology more harmful than beneficial, or vise versa? Could creations be superior to their creators? Is Earth unique in the universe? Where did humans originate? What is god?
I miss that show so much since it came to an end a couple years ago.