Bumbling Dad: Zigzagged. He's very good at his job and is a loving and attentive father...but nine times out of ten, his attempts at home maintenance turn out to be a disaster even when Steve isn't involved.
Butt Monkey: Often on the receiving ends of Steve's antics.
His mother Estelle makes more than a few sarcastic comments about her son's weight, too.
Can't Live with Them, Can't Live without Them: His general view of Steve. For all the times that Steve's damaged his person or his property, and otherwise driven him nuts, Carl realizes that Steve still looks up to him as a father figure, and has also helped the Winslows out multiple times.
Cursed with Awesome: When Myra messed with the transformation chamber that turned Steve into Stefan, she ended up turning Carl into a nerdy "Urkelized" version of himself. Stefan tries to fix the chamber, but he's having trouble since he's not as smart as he is when he's Steve. Fortunately, being turned into a nerd made Carl a scientific genius, and so he fixed the chamber himself before being turned back to normal.
Doom It Yourself: Carl's a top notch police officer. Unfortunately, when he starts trying to build or repair things around the house, things don't go so well. Occasionally subverted when he's paired up with Steve, as his attempt at building a shelf turns out just fine while Steve comes up with something that looks more like a post-modern art project.
The Artifact: After Steve became the undisputed main character, more and more members of the Winslow family got phased out. Unlike Laura, Eddie, and Carl, Harriette lacked any dynamic and comedic relationship with Steve leaving her as the odd man out.
Berserk Button: Degrading sex jokes about women, and guys bragging about who they scored with, both make Eddie really mad. That goes double for anyone who brags about having sex with his little sister.
Distaff Counterpart: One Christmas episode has Laura meet her guardian angel. He subjects her to a dream sequence to show her what she puts Steve through. She becomes Laura Urkel, essentially a female version of Steve. Steve becomes her spear counterpart as Eddie's brother.
Tsundere: To Steve. Initially a type A, then evolving into a type B.
Vitriolic Best Buds: With Steve for most of the series and, eventually with Myra too (until the last season).
Chuck Cunningham Syndrome: Probably one of the most infamous examples of this along with the trope namer. She disappears after Season 4, without explanation. Afterwards, the other characters act as if she never existed and Harriette and Carl only had two kids (Eddie and Laura).
Out of Focus: After Steve is introduced, she become a background character; in Seasons 2, 3, and especially 4, she is given very few lines (usually in scenes involving the entire family), until her character is completely eliminated in Season 5.
Heel-Face Turn: Sort of. Was originally introduced in Season 2 as the sidekick to the school bully, Willie, who picked on Steve, until he presumably stopped hanging out with him, after being arrested. Afterwards, he was rewritten as a good guy and one of Eddie and Steve's best friends.
Straw Loser: Eddie isn't the smartest person in the world but next to Waldo he looks like a genius.
Waldo is also there to show that Steve isn't Eddie's only friend who is a loser. Eddie's friendship with Steve makes more sense because all his bad qualities can be seen as not that bad when you consider that his other best friend is kind of dumb.
Distaff Counterpart: Was originally supposed to be one for Steve, just less clumsy and more attractive.
Face-Heel Turn: In the seasons where she and Steve were a steady couple, Myra was on friendly terms with the main cast and she even formed an Odd Friendship with Laura. By the last season, after her breakup with Steve, she becomes a villain and an Ax-CrazyPsycho Ex-Girlfriend trying to destroy Steve's relationship with Laura.
Chekhov's Gunman: He makes a single appearence in Season 5, when Steve changes his DNA as a plan to become cool. Later he turns into Stefan several times and in Season 7, thanks to Steve's cloning machine, Steve and Stefan become two different characters.