I'm so envious, wish I could watch those for the first time again.
Babylon 5 starts out a little rough, but the world building and foreshadowing culminates into multiple incredible payoffs. It caught me off guard how well layered and bananas the scope gets. There are few stories so well told. It was built on a 5 season run, but they weren't sure if they'd be able to do a 5th season, so they crammed everything into S4. Season 5 ends satisfying enough, wrapping up the story, but you can tell they shot their load in S4, it was a big load though...
Farscape got cancelled, but it was brought back for a 3 part mini series/big movie. I was a little disappointed in the rushed ending, but the ride to get there is totally worth it. It's such a creative show, and really well shot, there's really nothing like it. Where else have you seen a plant based character have a photosynthesized orgasm from a solar storm lol