Mine are Doctor Who and Star Wars

Red Dwarf is my top favorite but some others are...

Fringe
The X-Files
Mystery Science Theater 3000
Farscape

Can't say I have a particular fave, but Red Dwarf, an old-school classic parodying a lot of sci-fi from that era was essential late night Friday viewing on BBC2. Ditto (sort of) for The X-Files. Although after they moved production from Vancouver to LA I kind of switched off.

And the award for fave Space Drama goes to... Babylon 5.

Anime SF... GITS SAC

Watched and recorded the first eight seasons of Red Dwarf when they aired them on late night PBS. I have since purchased the dvds. Loved Red Dwarf X.

Watched the entirety of The X-Files on Netflix Instant. Those last two seasons were extremely difficult to get through.

Mine are also Red Dwarf and Doctor Who. I watched Red Dwarf from series six when they were first shown on BBC, in the mid 90s, and I'd seen a lot of them on repeats beforehand.

I got into Doctor Who quite late- the end of Tennant's reign, but I watched them from the beginning of Eccleston's reign, and thoroughly enjoy it

It's a tie between The thunderbirds and UFO.

Twilight Zone

In the past, I've enjoyed:

The X-Files
Red Dwarf
The Twilight Zone
Spellbinder (both seasons)

But at the moment though, my current interest in TV sf is mainly Battlestar Galactica for me (both 'classic' and the 2000's re-imagined series, although the less said of the godawful Galactica 1980 the better. In fact most BSG fans pretend it doesn't even exist.) :p

Live Action :
Star Trek Deep Space Nine
Space Above and Beyond
Automan
The Greatest American Hero
Quantum Leap
Doctor Who (Specifically the Tom Baker years)
SeaQuest DSV
Sliders
Alien Nation
V
Battlstar Galactica
ALF
Captain Power and the Soldiers of the Future
Red Dwarf
Airwolf

Animated :
Transformers (Generation One of course)
Robotech
Thundercats
M*A*S*K
Voltron (Vehicle Force)
.. just to name a few...

Futurama, Doctor Who

I like(d) Surface, but it was cancelled.

Star Trek: The Original Series
Star Trek: The Next Generation
Firefly
The X-Files

Doctor Who, no doubt.

Rocky Jones-Space Ranger
Space Patrol
Voyage to the Bottom of the Sea
Land of the Giants
Planet of the Apes
Firefly

Doctor Who
Star Trek: TOS
Star Trek: TNG
Star Trek: VOY
The X-Files
Continuum

Star Trek:
TNG
Enterprise
DS9

Stargate
SG1
Universe
Atlantis

X-Files
Fringe

Continuum

Battlestar Galactica (New)
Caprica

Babylon 5

Torchwood

Lost

Revolution

Farscape

Eureka

(others)

The Twilight Zone
Continuum
Star Trek TOS

Firefly, Stargate, Fringe, TNG, Voyager, Doctor Who (Tom Baker years especially, the newer stuff is over-the-top dramatic too often)

I have to say the X-files. Love to watch it on Netflix

Doctor Who and Star Wars here also.

I got into Doctor Who rather late, same as Schlubalybub, in the end of Tennant's era and beginning of Matt's era. Now, Star Wars is something I've been following since I know myself as a person

The original Twilight Zone and Outer Limits are my favorites, I dont know how many times i re watched them!

Fringe
X-Files (the last couple of season really didn't work without Mulder.
Lost
Continuum
Stargate SG-1 (original old school cast)

Live Action:
None for the moment

Animated:
Transformers (Generation 1 and Cybertron)
Mazinger Z
UFO Robot Grendizer
King of Braves GaoGaiGar

Star Trek: TNG, VOY, ENT, DS9
Doctor Who (New)
Torchwood
Babylon 5
Stargate (All)
Farscape
Terminator: The Sarah Connor Chronicles

Plus Many Others

Doctor Who (from November 1963 on)
Thunderbirds
Star Trek TOS
The Outer Limits (original not reboot)
UFO
Red Dwarf
Andromeda

I am still fond of Irwin Allen's tv shows- especially Lost In Space and Land of The Giants. Futurama, Twilight Zone.

---------- Post added at 05:58 AM ---------- Previous post was at 05:57 AM ----------

Yes, these are two of the greatest shows ever!

Babylon 5, Star Trek TNG, Doctor Who, 12 Monkeys, Agents of Shield etc.

Farscape
Babylon 5
X-Files
The Expanse