My all time favorite series which I will rewatch at some point:
OZ
Firefly
Fargo
Six Feet Under
Deadwood
The Office (US)
The Wire
The Sopranos
Breaking Bad
Better Call Saul
Black Mirror
Game of Thrones
I can't resist to mention a few others as well so here it goes: F is for Family, Dark, Westworld, Bojack Horseman, Sons of Anarchy, Archer, Battlestar Gallactica, Rick & Morty, Seinfeld, Arrested Development, True Detective S01, Stranger Things, Peaky Blinders, House of Cards, Mindhunter, Killing Eve, Master of None, Parks & Rec (first seasons), Hannibal, Orange is the New Black, Luther, Shameless, Family Guy, La Casa de papel, Homeland (first seasons), Mad Men (first 5 seasons), Twin Peaks, Billions, Community, Hannibal, Godless, The Shield, Skins, Boardwalk Empire, Curb Your Enthousiasm, The Deuce, Fringe, Entourage, Californication, The Killing (EU version), The Inbetweeners, Band of Brothers, The People vs OJ Simpson, Freaks and Geeks, Big Little Lies, Misfits, Luther, Spaced, Couples, Fawlty Towers.
Currently looking to start watching The Mechanism, Gomorrah and Rome in the coming months. I've become very selective in what I watch as it has become impossible to stay up to date with everything you might like. Generally after one or two episodes I know whether I'll like it or not. For example I recently stopped halfway through episode 1 of Lucifer as it felt cheap with mediocre acting and a lousy story.
In my defense, I never watch "regular tv" or sports. Cut the cable a long time ago! Honestly started as a small list but when you start thinking about it, hard to stop... Probably forgetting plenty worth mentioning but I'd start with those listed at the top. Can't miss with those! I know it's not really the point of the topic but I guess it is not a bad reference list for people looking for a good show to watch. Also left out all documentaries etc here.
If I do the same for films I won't be able to ever stop so I won't. But I'll maybe post some films that are less well-known soon.