Babylon 5 is the best science fiction series ever IMO (if you can make it all the way through). The first season was especially campy, but the world building,

Babylon 5 is the best science fiction series ever IMO (if you can make it all the way through). The first season was especially campy, but the world building, geopolitics (not politics, but how the alien species interact), storytelling, and philosophy are all very thought-provoking. Yeah it had amazing space battles, but where it shines the most is in the dialogue. I still get chills to this day from some of the discussions. The show is even better on a second or tenth watch as all the foreshadowing is so apparent. I thoroughly enjoyed DS9 as well, but outside of some things like Quark and Garrak, I feel it to sometimes be a pale imitation of B5. Farscape is just freaking weird, but just so much fun. The characters have no restraints on emotion. There is no chain of command. Stargate SG-1 and all the spin offs are also extremely good and the only science fiction show my wife could really get into. If you haven't watched it yet...well then you have like 18 seasons and a few movies to get through if you count all the TV shows.