I've never seen a Star Trek movie or an episode from half the series'. I've started watching the Stargate movie once and never finished it. I have no clue what Babylon 5 is about, but presumably it would be about Babylon--and there would be five of them.
Yet I find this series incredibly compelling. It doesn't get mired in traditional sci-fi's technobable, inexplicably numerous alien species or deus ex machina centered around reversing the polarity of a satellite dish. It explores topics that are otherwise ignored by its peers: terrorism, torture, racism, ethics and morality. Incidentally, the cheesiest aspects are reminiscent from the original.
Also, it features some of the best choreographed dogfights ever. In part 1 of Resurrection Ship, not a single shot was fired but the engagement was completely thrilling. Part 2 of Exodus with the atmospheric re-entry was brilliant.
The conclusion of Season 3 is executed fantastically.
There must be some kind of way out of here
Said the joker to the thief
There's too much confusion
I can't get no relief