This show was totally unique. Nothing has been done like it before, or since (with the possible exception of the Simpsons, which does mimic some of the "nothing" plots a little). While it was about nothing, it was really about everything--but the little things that no one thinks about, like giving your bank code to your fiancé. I also liked how this show was the last of the "non-fashion" shows.
You always saw Kramer wear the same ridiculous jacket, pants, and shirt. George always had those too-small plaid shirts and even Jerry had the black-and-gray striped shirt we saw him wear in the one where he and George make "The Pact". Even Elaine had many of the same clothes, even after her "make-over". I mean, I LOVE the show Friends but every time the guys have a new turtleneck or sweater, and the girls always have a new dress or a new pair of pants, which is totally unrealistic (for the guys anyway).
This show had consistent humour all the way up to the last season, which is unusual for many shows. I LOVED George styling his hair to look like the bald guy from NYPD Blue, Elaine buying the JuJubes on the way to the hospital, Uncle Leo yelling "STOP THE SHOW" on the PBS special--these were just some of the great moments! This show is the best on televison, and if you haven't seen it, go and watch now!