I enjoyed Seinfeld because it portrayed a series of profiles of narcissism. The last show revealed this (the one where everyone adversely affected by the narcissistic behavior testified in court). To have people who are so superficial, so extremely self-seeking is cynically funny.
As a counselor and minister, I do not run into some of these extremes, although there are a lot of toxic narcissists out there. However, today I tried to get a crack addict to go to detox and had to fire a person with a "does not play well with others" personality. Watching Seinfeld sort of destresses you from this kind of thing.
Rocky and Bullwinkle did not present the same sort of narcissism. I think the comparison you see is the dry humor, irony and cynicism present in Seinfeld. Rocky and Bullwinkle was a favorite of mine as a teenager.
That's an excellent way to put it. I've tried to figure it out exactly; it's very clear that if, in real life, if I knew anyone like any of the characters I'd probably not be friends with them, they're despicable, but on the other hand being a human I have a little bit of all the characters in me.
I never figured out why that was funny, but I did think it was.
I would also observe that it was often a great satire of politically correctness. I remember especially "not that there's anything wrong with that" episode when it was clear that the characters did indeed know there was something wrong with that.