True Detective, Perry Mason, The Flight Attendant, Watchmen
True Detective Season 1 is awesome. Season 2 stinks. Season 3 is ok, but ultimately disappointing.
I thought Perry Mason was excellent, although it has some gratuitous "HBO Stuff" than you may have to fast-forward through.
As others have said, the flight attendant is great. I am at episode 3 now.
The Watchmen is good too. Its a slow burn, but I found it engaging.
Also, if you like movies, they have lots; Dunkirk, Blade Runner 2045, Ford V Ferrari, etc.
Some classic series you can consider watching if you haven't already: The Wire, Sopranos, Band of Brothers, The Pacific
HBO has a lot of series I didn't care for; take this list for what it's worth (nothing, its just opinion):
- True Blood
- The Leftovers
- Westworld
- Boardwalk Empire
- Silicon Valley
- Entourage
- Raised by Wolves