As in real life, Jerry is a fan of comic book characters, particularly of Superman, who is his hero.
As far as sports, Jerry is a fan of the New York Mets as evidenced as early as the episode "The Baby Shower" in which Kramer persuades him to install illegal cable by saying "The Mets have 75 games on cable this year." Jerry is also a fan of the New York Yankees, the New York Knicks, the New York Giants, the New York Rangers, and even the Chicago Cubs.
In "The Rye", during a particularly trying time for Elaine, she angrily tells Jerry, "You know, one of these days, something terrible is going to happen to you. " Jerry simply replies, "No, I'm going to be just fine." Many of the problems he does run into are the result of the actions of his nemesis Newman, a disgruntled postal worker.
In "The Old Man", George asks "What kind of a person are you?
The series revolves around Jerry's misadventures with his best friend George Costanza, neighbor Cosmo Kramer, and ex-girlfriend Elaine Benes.
He is usually the voice of reason amidst his friends' antics and the focal point of the foursome's relationship.
Kramer has persuaded Jerry to wear the "pirate shirt" in "The Puffy Shirt", the cowboy boots in "The Mom & Pop Store" and the fur coat in "The Reverse Peephole".In "The Opposite", this tendency is explicitly pointed out, as Jerry goes through a number of experiences after which he invariably "breaks even," even as his friends are going through intense periods of success or failure.Even when Elaine threw Jerry's bill out of the window, he unexpectedly found one in his coat pocket, evening out his luck.This results in the two of them also switching personalities.
In several arguments with Jerry, Kramer is incredibly stubborn, protecting his own interests.In the episode "The Serenity Now", Jerry is perplexed by his experience of crying, asking "What is this salty discharge? He will often nonchalantly state, "That's a shame" when something bad happens (often due to his or his friends' actions).