Breaking Bad got substantially better in S3+
Always Sunny same, Frank gets real weird with it.
Mr Robot season 1 and 2 were amazing but 3 was unbelievable.
It's Always Sunny in Philadelphia, of course.
Girls.... well for me it was since that's when i got into it.
Person of Interest really kicks on in season 3. Not that 1 or 2 weren't good, but from season 3, I realised I was watching something that was going to have a permanent place in my heart.
I love seasons 1 and especially 2 of Fringe, but season 3 is very arguably even better.
Twin Peaks. Season one may be the tightest and cohesive story but season three was just something that will never be recreated, not even by Lynch himself.
Most shows are good until 5 seasons not the third that’s pretty common.
Farscape - Season of Death
I think Friends really hits its stride during season 3. The first two seasons are good, but not as great as 3+
Imo Bojack Horseman's 3rd and 4th seasons were better than the first two. Especially the whole thing with his mother's backstory and his daughter. It was pretty deep, you really feel the things he feels, the character development is perfect.
Okay it's season 4 but every epsidode of Black Mirror's latest series was mint condition.
There will be those who disagree which conforms to Louis C.K law: that when you start out you just attract people who like you then you crossover to mainstream recognition and inherit those that like you and those that don't (and those you jerked off in front of :) ).