There was a time that any new sci-fi show that was on would be watched - at least at first - by me. I started watching B5 when it first aired on Channel 4 in the UK (so I would have been um, 13ish - I can't remember when we first got itearly teens anyway). I was hooked from the beginning (but drifted away in series 5 mainly because of the completely unreasonable changes in times that it was shown at). I liked it at the beginning - was completely obsesses between series 3 and 4 and even dipped in and out of crusade.

I liked the Trek stuff; Quantum Leap; X-Files; the repeats of the old British sci-fi (inc Doctor Who), Buffy (but not Angel); more recently the new Doctor Who, Torchwood, Andromeda, Heroes and so many others I've lost count.
Not really so much in fandoms but I do still like my sci-fi shows - along with the complete Universe of Babylon 5, I have the Farscape box set and all the La Femme Nikita series.