Stargate Universe, just because I'm worried.
Speaking as someone who never really got into the other Stargates (although I could see myself casually off-and-on continuing Atlantis beyond episode one), I absolutely loved the new direction for the series.
The drama, the characters, the mystery, everything seemed to come together way better then first seasons usually get too, and I can't wait for season two to start on Tuesday.
However, I know the overwhelming majority of existing fans of the franchise hated to its core and desperately desire being able to watch the entire cast and crew get spaced. And the real tragic part is I haven't seen any of these fans give a reason that doesn't sound like it stems directly from fan-boy hatred of anything that tries to be different then what they've done before (See the same attitude that got Enterprise canceled, something I will never forgive the human race for).
I honestly don't know how well it's doing for itself, and as usual in these situations those that hate are louder then those that don't, but I really hope this one stays around for a while. Or at least they get enough warning to give it a proper ending. The Destiny deserves nothing less.