If you haven't watch Expanse then you are missing out on the next best thing after Game of Thrones. The characters are carefully cast and each actor brings a different persona to their roles. By the first season you get a deep understanding of each character and what each role are.
The storyline is original to it's form from what an outerspace series is about, but shakes it all up by introducing politics, religions, racism, and everyday real life events in a futuristic world. The imagery, OMG, watch it on a high resolution TV and you will be blown away with what you see.
Overall this show is there with the likes of Star Trek, BattleStar Galactica, and sometimes even exceeding it. I would say it's a must binge show but with this show being this good I would recommend to slowly watch it.