This summer I binge-watched all 6 seasons of Longmire.
Hell On Wheels was a pretty good series, and I really enjoyed Deadwood.
I thought The Americans was outstanding. At first the premise seemed implausible, I was prepared for a lot of disjointed plot shifts and silly dialog, but was pleasantly suprised. The storyline became increasingly complex and suspenseful with each season.
I also like documentaries about conspiracy theories, shows about AI and singularity, and Bit Coin, blockchain, and data mining. I also listen to George Noory for the UFO stuff.
Basically, I have such ecclectic tastes that I'll watch whatever I'm in the mood for at the time. Sometimes it's YouTube vids of Ray Kurzweil, Michio Kaku, variosTedTalks topics, etc.
Tonight I'm a little brain-dead so I don't want something with a complex plot. I think "Man with the X-Ray Eyes is on Prime...