Seeing the answers, I concur with Firefly and Battlestar Galactica.
Firefly was good even though it wasn't on very long.
the walking dead (epic)
true blood (amazingly awesome!)
fallen (mini tV show)
secret circle (not really my fave)
teen wolf (entertaining)
Am a TV show addict...
Star trek, Stargate, Once upon a time, Charmed, Hex, Grim, Game of thrones, V (both the old and the new one)
I would start with SG1 and then Atlantis
If you want Sci-Fi, Star Trek should keep you going for a few months.
Or Doctor Who (2005 onwards for more up beat version), which is Sci-Fi.
You could also try Merlin, some proper medieval fantasy ba
Sci-fi? DOCTOR WHO! So British! Lol