TV Spin-offs

There are a couple of parent TV series and its spin-offs that I watch and I personally think some of these spin-offs are even better than the original series that preceded them! :)
Star Trek: The Original Series and its spin-offs:
Star Trek: The Next Generation
Star Trek: Voyager
Star Trek: Enterprise
Stargate SG-1 and its spin-offs:
Stargate Atlantis 
Stargate Universe
JAG and its spin offs:
NCIS
NCIS: Los Angeles
CSI and its spin-offs:
CSI: Miami
CSI: New York
Buffy the Vampire Slayer and its spin-off:
Angel 
The Vampire Diaries and its spin-off:
The Originals