Homer Simpson might be lazy, unintelligent, immature, overly-aggressive, and incompetent at work, but he can rest easy knowing he is a legend. Homer sits at second place on the list of "Top 50 Greatest Cartoon Characters of All Time" and several other publications have also listed him as one of the best TV characters of all time.
Alongside Lisa, he is one of only two characters to appear in every episode of the animated sitcom (695). He is also the only one who speaks in all episodes. Fans of the show are well aware of Homer's drinking exploits at Moe's Tavern and his struggles at the Springfield Nuclear Power Plant, but some tiny details might be hard to notice.
Conflicting Blood Types
Homer once volunteers to donate blood to Mr. Burns, with the intention that the Springfield Nuclear Power Plant boss will reward him when he gets better. At this point, Burns has been diagnosed with "hypohemia" and needs a double-O-negative donor. Unfortunately for Homer, he doesn't qualify as a doner since his blood is Type A.
However, there are different details mentioned about his blood type later on. When Marge wants a fourth baby, she and Homer try to have one. Sadly, Homer has become infertile. But there is a lucky break when it's revealed that Homer was once a sperm donor and his sperm donor profile (under the name Thad Supersperm) shows his blood type to be AB.
His Favorite Song
Homer's favorite song is the 1982 classic It's Raining Men by The Weather Girls. In Season 6, he gets unfairly banned from Moe's Tavern for pulling a harmless prank on Moe.
Prior to that, Carl, Lenny, and Barney pull life-threatening pranks on Moe, including burning him with fire, but no punishment is given to them. As he gets kicked out, a copy of Homer's favorite song is removed from the jukebox and thrown outside. It then lands in a random car and the driver is thrilled to have it.
He Had Diabetes At Some Point
Relationships go through several tests. Early in their relationship, Homer and Marge almost part ways for good. This happens when Marge falls for Springfield University's Professor, Stefane August. In an effort to get Marge back, Homer composes a song for her.
When Marge finally breaks up with August, she goes looking for Homer and finds him holed up in his house. He has a needle with him so Marge thinks he has started doing drugs to ease his pain. Homer then clarifies that the needle is for his insulin. Interestingly, he is never seen taking the insulin again, so hopefully his condition got better.
His Year Of Birth
Since the animated sitcom uses a floating timeline, the characters never really age. To avoid messing up the continuity, the characters' years of birth are never mentioned. For example, Bart's birthday is April 1st, while Lisa's birthday is revealed as May 9th, but the years of birth are left out.
Homer's birthday remained a secret for most of the sitcom run. That's until his driver's license popped up. Tiny writing on his license shows his birthday as May 12, 1956. This means he'd be 64 today if the floating timeline wasn't used. The license also shows that he s a certified Class C driver.
He Has Died A Total Of 22 Times
Homer has died 20 times in the "Treehouse Of Horror" Halloween segments, which are considered non-canon. In the main show's continuity, he has died two times.
He first dies of a heart attack when Mr. Burns tells him he is poor at his job. Mr. Burns then decides to send a ham to Marge as consolation for Homer's death. When Homer's soul hears the word "ham," it rushes back into his body. He also dies while wondering whether to tell Marge about his lottery win. His soul realizes it has made a mistake and returns to his body.
The Reason He Constantly Eats
Homer once confesses that the reason he eats all the time is due to childhood trauma. As a child, he accompanied Carl, Moe, and Lenny to a quarry to have a swim. Upon jumping into the muddy water, a man's corpse fell on his lap. It turned out the corpse belonged to Waylon Smithers, Sr.
The experience had several effects on Homer. It made him hit puberty early and also gave him a desire to eat all the time. Mr. Burns later explains that Smithers died while trying to save the town from a nuclear meltdown.
His IQ
For most of his life, Homer has had a low IQ of 55. This detail emerges when Homer takes up a job at a medical testing center. Initially, his low IQ is thought to because of the hereditary "Simpson Gene," but when the doctors at the testing center scan his brain, they see a crayon lodged inside.
Apparently, the crayon has been in his brain ever since he was six years old. The doctors decided to remove it and when it's finally out, his IQ shoots to 105. He is thus able to bond with Lisa, who has the second-highest IQ in the Simpson family (159) after Maggie (167). His newfound intelligence makes him unhappy, so he asks for the crayon to be reinserted.
He Just Might Be A Billionaire
In the world of the Simpsons, Homer is the proud owner of the popular American football team, the Denver Broncos. According to Forbes, the value of the sports team is $3.2 billion. Since he has never sold or passed over the team's assets to another person, Homer qualifies as a billionaire.
How does Homer get to own the Denver Broncos? Wealthy evil genius Hank Scorpio gifts the team to Homer after he helps the Globex Corporation in their evil schemes. Homer is upset that he wasn't gifted the Dallas Cowboys, but he settles for the Broncos anyway. The team is last seen in season 11.
He Has An Email Address
After Homer gives Lisa a personalized movie instead of a diary for her birthday, she becomes devastated. She claims that her dad has never understood her (which is somewhat true) and shuts him off.
Desperate to impress his daughter, Homer follows Moe's advice to have Lisa followed by a private investigator so that he can learn about her likes and dislikes. He gives the PI his email address so that he can reach him easily and it's seen on his computer as "chunkylover53@aol.com."
He Is An Animal Whisperer
This becomes evident when the family dog, Santa's Little Helper, impregnates Dr. Hibbert's dog. Since Dr. Hibbert has no intention of caring for the puppies, he gives them to the Simpsons.
Lisa soon learns that Homer had once taken Santa's Little Helper to be neutered, but decided against it. This is because Homer communicated with Santa's Little Helper and the dog told him he didn't want to be neutered. While Lisa, an animal lover, agrees with Homer's actions, other members of the family feel that the puppies could have been avoided if he did what he was supposed to do.