I travel on business a lot - I was in Phoenix last week, LA right now, and am in Bangkok next week. So I watch a lot of streaming stuff downloaded to my laptop that my wife does not want to watch.
Over the past couple weeks I have worked my way through all 3 Citadel Series - and I will start by saying these are all perfectly good airplane series to binge.
Citadel itself was a little hokey, but I still rate it a 5/10 - and I am perfectly ok with 5/10 entertainment on an airplane. While there were some acting problems and stuff and I was aware they were trying to keep it simple enough for a broad audience - I actually came away wanting more and hopeful it would get better.
Citadel Diana was 6/10 - Essentially all of the problems with Citadel are here also, except that I really liked the two main characters, Diana and Edo. I thought a lot of the politics of Manticore made no sense, but overall a good watch.
Citadel Honey Bunny - 7/10 - The best of the 3 so far, and this would have been a good series regardless of whether it was in the Citadel universe or not. And because that was way more subtle than in Diana, where it kind of unfolded the connection to Citadel/Manticore as it went on, the pacing was really good.