Battlestar Galactica - one of the most critically acclaimed series on TV, and one that most fans will agree is fantantic. 5% of the voters on here think its the best thing, and many more like me would put it 2nd or 3rd.
Smallville - Must be pretty good to get to Series 8 without any loss in audience, and a pretty good audience to begin with.
Sarah Connor - i agree a bit lame, but when it started it had potential to become great. as it turned out, it just became shit instead.