At the moment, Firefly is leading with almost 2 000 votes, probably because a link to the poll has been posted to a Firefly fansite of more than 25 000 members.
Dodctor Who and TSCC are respectively in second and third position :
Firefly (24%, 1,936 Votes)
Doctor Who (14%, 1,177 Votes)
Terminator : The Sarah Connor Chronicles (12%, 1,001 Votes)
Battlestar Galactica (new) (11%, 943 Votes)
The X-Files (9%, 722 Votes)
Star Trek TNG (8%, 660 Votes)
Stargate SG-1 (4%, 360 Votes)
Babylon 5 (4%, 311 Votes)
Farscape (3%, 245 Votes)
Star Trek DS9 (2%, 149 Votes)
Side note : I could not log in the site for days, this is why i didn't create a thread at the SG Wiki earlier; it's fine for me now.