@racheltobac While I think the Expanse was great, and I am a Trekkie, my all time fav sci-fi universe is Babylon 5 and the HBOMax digital remaster (not the movies or spinoffs) is worth the watch or rewatch!
B5 was the forerunner of 5 year story arcs in the early 90's, was the first to have realistic space vehicles from a physics perspective, created by acclaimed writer J. Michael Straczynski, on time on budget, and in bringing CGI to the industry. CGI powers todays 3D graphics industries. The Expanse reminded me of these facts as it portrayed a 5 year story arc with some interesting physics details as well even though they have vastly different content, plots, characters, and stories.
Both are well-written and directed series' that help us think about where humanity is today and is going in the future "if we are not careful". The intersectionality in B5 is very intriguing and the foresight of JMS to see into the future of politics and supremacy divisions is uncanny. He addresses nearly every societal issue within the series itself much more so than within the Trek universe even though DS9 writers attempted to do so.
It has been interesting to see the reactions of millennials and Gen Z to watching B5 for the first time while they are podcasting their commentaries. ;) In any case, it is definitely sci-fi of interest to anyone who enjoys great story lines with a focus on science, sociology, politics, diversity, futurism, and intersectionality. So I encourage anyone to take a fresh look given the state of our world - especially since 2016 in the US.
Cancelled series you may enjoy are: BSG Prequel Caprica and B5 spinoff Crusade. I recommend any of the B5 Movies as well but they make more sense when watched in conjunction with the series.