Some nice, smooth, consistent quality. Better Call Saul was in my opinion pretty consistent. Single season anime is almost always consistent, like My Dress-Up Darling or Terror in Resonance.
Not dragging on longer than the series needs to seems to be a key point.
I can’t believe nobody has mentioned The Good Place yet. Solid from tip to tail with some amazing twists and not a single arc. Also they really stick the ending. If you haven’t seen it yet I’m jealous.
The show never gave us too much or too little Donkey Doug. It was always the right amount...and that, of course, is ethics in a nutshell