down the best frakkin' thing on TV. 
Yeah until like halfway through the second series, then it became as bad as Star Gate Atlantis.
BSG was pretty consistent throughout IMO.
I even watched Caprica. Though I was less enthusiastic about that series, I found all the BSG backstory interesting.
What was wrong with SG: Atlantis? I agree it wasn't as good as SG-1's first 8 seasons, but I actually like it better than SG-1's last couple seasons.
Hell I even watched SG:U though I was a bit lackluster with taking the show into a darker BSG-esque direction since that's just not what I came to love about the SG series. SG is about a good combination of humor, adventure, and entertaining character interplay.
Now Firefly...I just started watching that from the Science channel (which is replaying the series) for the first, and I'm really enjoying it. There aren't even any new episodes being made and it's the best thing currently airing on TV IMO.