George and Jerry Seinfeld met each other in their high school gym class and they have remained best friends ever since. George is most often seen living with his parents, Frank Costanza and Estelle Costanza, who are just as neurotic as George. Jerry has stated that if George's parent got divorced at an early age, he might have turned out normal.
Throughout the series, George has had a number of jobs. He is unable to maintain a steady job, and is often fired because of a pathetic action. His jobs includes working for The New York Yankees, Kruger Industrial Smoothing a Screenwriter and many more. In the first season of the show, he is shown as a real estate agent. He ended up quitting that job and slipped his boss a mickey.
Although he never became one, his dream-job has always been being an architect. He has on several occasions lied about his occupation, and stated that he is an architect. He first does this in The Stakeout. In The Race he claims that he designed the new addition to the Guggenheim. Infact, George lies about his life on a daily basis. Even too the point that Jerry once came to him to ask how he would be able to trick a lie detector. George then quoted "It's not a lie, if you believe it."
George has along side Jerry had experience in writing a Pilot for a sitcom. When George and Jerry were the pitching the idea for a "show about nothing" to the NBC executives, George was asked if he had any previous writing experience. George claimed he had written an off-Broadway play entitled La Cocina, which was about a Mexican chef named Pepe.
George is best friends with Jerry, and rarely gets into arguments with him. However he is often seen argumenting against Elaine. Although he is also seen co-operating with her in several episodes. George is most comfortable around Jerry. Around Elaine and Kramer, he can get quite uncomfortable. Him and Elaine have problems keeping a conversation going when they find themselves alone, too the point that they once had a talk about how they have nothing to talk about. Kramer seems to have a better relationship with George's parents, than he does with George. Kramer and Frank Costanza have even had a few episodes where they both team up for various reasons.
George and Susan
George has been with countless women throughout the run of the show. Most of them last only one episode and they also end quite badly. His longest relationship has been with Susan Biddle Ross. Originally they broke up, but they got back together and George ended up proposing to her. George immediately regretted the proposal but didn't have the heart to end the engagement. Literally days before the wedding, Susan passed away because George picked up the cheapest wedding invitations, which contained toxic glue. This is one of the few relationships that have ended "well" for George. On the ninth season DVD for the finale, it was stated that George had in total dated 62 girlfriends through the course of the show.
Despite not having the most attractive exterior, George can occasionally be quite nit-picky about the women that he chooses to date. In The Fix Up, George refused to go on a blind-date, unless the girl had thick lustrous hair and a "pinkish hue". However sometimes he can fall for a girl because of the smallest of things. In The Blood George dates a women just because she, like him, enjoys pastrami. George is also supposedly the inventor of the "it's not you, it's me" routine, often used in break-ups.
George has had a number of pseudonyms over the years, the most common being Art Vandelay. This name first appeared in The Stakeout, in which George and Jerry needed an excuse to give to a women on why they were waiting in the lobby of the office building where she worked. The excuse they went with was that they were meeting a gentleman named Art Vandelay, for lunch. In The Boyfriend, George tells the unemployment office that he is really close to getting a job at Vandelay Industries. This name has also been used by Elaine as a fake boyfriend. She also says that Art Vandelay is an importer/exporter. In the series finale, when the gang is in the court-room, the judge is actually named Art Vandelay.
In The Limo, George took the identity of a man named Donald O'Brien in order to take his limousine. He later discovered that O'Brien was the leader of the Aryan Union who was about to make his first public appearance at Madison Square Garden. George has stated that if he ever became a porn-star he would call himself "Buck Naked". In The Maid, George finds himself unsatisfied with his name and wants to be known as T-Bone. However before he can tell this to his co-workers at Kruger Industries, someone else gets the nickname, T-Bone. He was later given the name "Koko The Monkey" because when he demanded his name back from the coworker, he was flailing his arms like a monkey. Later on, when a Jamaican women started working there, his nickname was changed to "Gammy".