Kelso was dropped on his head as a child, which is basically the story of his life. How else do you explain his penchant for pre-Jackass jackass behavior, like skiing off the top of moving cars and falling off the water tower, like, every episode? Luckily, when the chips were down, Kelso had a big heart and enough brains — he did score a 1030 on his SATs — to eventually do the right thing.

As dim as the day is long, Joey was the ultimate hot-but-dumb guy. For every girl he bedded with a "How you doin'?", there was a "Netherlands is this make-believe place where Peter Pan and Tinker Bell come from" — and then some. But we all know that his lack of intelligence is a moo point (aka a cow's opinion) since, like any good friend, if he had to, he'd pee on any one of you.

With a bumbling first mate like him, it's no wonder the poor passengers of the Minnow were lost at sea. Still, the Skipper's "Little Buddy" worked hard and tried hard, even when he was throwing out the anchor — without a rope attached — or inadvertently undermining all efforts to be rescued. Like many TV characters of his ilk, his good intentions forced people to forgive him — even love him.

Kelly is as dense as she is promiscuous. She thinks Yogi Bear is a nature documentary and once wrote a book report on Gilligan's Island mistakenly thinking it was Robinson Crusoe. (Thanks, dear brother Bud!) Deep down, beneath the peroxide blond hair, she has some surprising and hidden mental acuity (like when she calculated the correct trajectory to shoot garbage into a neighbor's yard) and a sensitive, caring nature that allows her to both champion her snotty little brother and mourn their dog when he died.

D'oh! Homer's beer-swilling foolishness has driven hundreds of story lines throughout the years. When Homer had the chance to be smarter — by removing a crayon lodged in his brain, no less — he decided that he actually liked himself as a simpleton. He had the crayon reinserted into his brain saying, "All right, brain, you don't like me, and I don't like you. But let's just do this, and I can get back to killing you with beer."

The deputy sheriff could barely get the gun out of his holster, let alone use it. Good thing that Mayberry had virtually no crime. In the clutch, he was a bug-eyed, twitchy mess. He could be egotistical, to boot, but everyone knew he was just camouflaging his own inadequacies. Knotts' performance as Fife was so iconic and well-loved that he won five Emmys.

This consummate "dumb blonde" is about as ditzy as they come. She's often childish, befuddled, and displays lapses in logic, such as when she declares, "Eat your salad before it gets cold." Despite these shortcomings, she's always a favorite because of her sunny and innocent personality and rather charming, snorting laugh.

We've watched Jake grow up before our eyes, as his dim-witted charm turned into surly cluelessness. A classic underachiever who can fart with the best of them, Jake will never be valedictorian (especially if he thinks there's one "zero" in $1 million), but don't think he's not a keenly perceptive and thoughtful guy. After his uncle Charlie dies, Jake tells his dad that he wants a wife and a family by the time he's Charlie's age because his uncle seemed lonely. Smartest thing he's ever said.

Charlie Kelly (Charlie Day), It's Always Sunny in Philadelphia When a character enjoys dressing up in a green lyrca suit at sporting events and eating milk steak and cat food, he must be an idiot. But unlike his obnoxious, self-centered and completely indifferent Paddy's Pub cohorts, Charlie is a fairly sympathetic character precisely because the rest of the gang takes advantage of his lack of brain cells every chance they get. Why else would all the worst jobs at the bar (read: cleaning toilets) be deemed "Charlie work"?

World's Best Boss? If that includes making inappropriate comments and lacking general self-awareness, then sure, Michael Scott is the World's Best Boss. But you can't really hate him — underneath his blunders, he means well. Besides, who's better at lightening the mood at Dunder Mifflin when things get hard? (That's what she said!)

Isn't he totally the young, male version of Rose Nylund from The Golden Girls? Woody's from a small town, is totally lovable and is completely naïve. Remember when he got to be president (sort of)? "Oh yeah, well I'm calling your bluff. I'm firing all my missiles, too. All of 'em!"

His 6-foot-8 presence in the courtroom loomed large, but he was a gentle giant who came across as naïve, especially compared to his counterpart, played by Selma Diamond in the first two seasons — and considering all the two-bit reprobates he had to keep a watchful eye on. When he realized he was being a dim bulb, he would slap his forehead and utter, "Ohhh-KAY."

He may be socially inept, agoraphobic and claustrophobic, but Gob created Franklin ("My name is judge"), works as a magician and does the best of the Bluth family chicken dances. What doofus could be more awesome? Plus, he's harmless and obviously cares very deeply for his mother... even during bath-time when "anything goes."

The youngest Dunphy, Luke is more innocent than stupid. (He thought Claire called Gloria a "coal digger" instead of "gold digger.") But even though he gets his head stuck in the banister and goes along with his dad's ridiculous stunts (it's no secret which parent Luke takes after), Luke is able to surprise us with his ingenuity. After all, with the help of his trusty squirt gun, Luke was the only member of the family who was able to get Haley to study.

As one of four extraterrestrials on an expedition of Earth, Harry is a squinty-eyed oddball prone to misunderstanding humans and taking every pratfall possible. At one point, when this communications officer explores the freedom of nudity, he also unfortunately discovers the necessity of protective clothing while cooking with hot oil. His naivete can come off as childlike and endearing, which in turn illuminates the ridiculousness of the human experience.

Gol-l-l-l-ee! A lovable, easily amused rube who started on The Andy Griffith Show, he would drive Sgt. Carter absolutely nuts in the spin-off — which never fell out of the Nielsen top 10. Carter eventually liked Pyle, finding him irrepressible for always seeing the good in people, as did the audience. The character, though, left such an impression in American popular culture that his first name has come to mean stupid and has been referenced in movies, TV, classic rock and video games over the years.