I think "30 Rock" is one of those overrated sitcoms where everyone acts way too wacky, yet people talk about it like it's the cutting edge of comedy and some kind of high water mark for creativity and originality in the genre. I just don't get it. Same goes for "Arrested Development".
If you don't see how those two shows are superior creatively to most other run-of-the mill predictable sitcoms, then you just must not be a fan of the sitcom genre in general. Compared to most of the sitcom drivel on TV, those shows are extremely clever and fresh. They are a "high water mark for creativity and originality in the genre", as they have consistently great writing. Watch a few episodes of According to Jim, then watch either one of those shows. It's so obvious to me.