I was enjoying The Expanse until the Marco Inaros arc started. From that point onwards the show felt rushed, mostly repeating the formula of so many other shows, and sidestepped all the alien bits that could have been interesting.
I much preferred BSG, even though it had plenty of boring "west wing in space" episodes.
I thought the political episodes were some of the most interesting ones. I love how Apollo grew up to challenge the attempted coup and ultimately became President as the series wound down. Also loved Richard Hatch's Tom Zarek character and the religious cult formed around Gaius Baltar.
All in all, I really enjoy all the moral greys in the series.
I much preferred BSG, even though it had plenty of boring "west wing in space" episodes.