I liked the new Battlestar Galactica show. Couple of characters I disliked, but all in all it shows promise. The Raptor was an interesting vehicle, strange that they were able to take on so many civilians but only had a crew of two.
Babylon 5 was a good show, but when it went beyond the four original years, the final season was lame. I definitely did not like the Sheridan as President and the new B5 female commander. Also B5 Crusade was lame as well.
As far as the Star Trek series, I like Enterprise, although I can do without all the skimpy Vulcan costume scenes (she does look good though). Never seems like it adds to any of the plot.
I tend to prefer to watch any sci-fi series. I even watched the Firefly series on Fox. Decent premise, but the show went under rather quickly.