I think it ' s because they still haven ' t found their ' Grove ' yet . Case in point , blackadder . The first season was a bit all over the place . The characters didn ' t have set roles . I mean they did , but it wasn ' t as good as when they did eventually understand everyones part . Season 2 was when everything began falling into place and the rest followed suit . Same with Seinfeld , felt more natural at season 2 . As well as the office usa . First few episodes were eh . Following that was just pure amazing television . The big bang theory . first pilot episode ever , penny wasn ' t In the series . It was a different , brunette chick . During the transitions between scenes , some overlay voice would yell SCIENCE which was weird and cringy as hell . They experimented and came up with the big bang theory that we had in the beginning . Then it derailed from its main premise which was just a bunch of nerds doing things but that ' s plotcharacter development , But I digress . Hope I highlighted some of the reason .