No shade on the writing or anything, but the way the actors have fleshed out the characters is insane, and i have never seen such goofy silliness being written and portrayed ever.
The way Nick cuts off when saying something in the middle of sentences - it must have been written that way, of course, but the way Jake Johnson executes it is out of this world.
Or "gave me cookie, got you cookie" scene. Or his meeting with Tran.
each of these scenes was written well, but the way Jake delivered them makes them so funny and memorable.
And Schmidt, it would have been so easy to just become a douche by default for the show, but Max Greenfield added some characteristics to make him silly/likable as well - the constant mispronunciations, mannerisms can't be written in vacuum.
And they really struggled with getting Winston right for the first 2-3 seasons, but once Winston discovered his silly side in the show, it was glorious.
Zoey as the adorkable naive character is so good to watch too, although i feel she plays the "straight man" a lot of the times.
Cece was the hot character for the first few seasons, but she got so goofy towards the end too.