- Base-Breaking Character: Kevin O'Leary. Viewers either love him for being the most entertaining member of the cast or hate him for acting like a Jerkass and a Smug Snake.
- Face of the Band: On the Canadian Dragons Den and Shark Tank, Kevin O'Leary, who did both shows simultaneously for five seasons. In Shark Tank, he sits in the middle of the panel, does most of the narration duties, and remains the only investor to be present on every episode of the show. His quirks also fuel most of the show's Running Gags. In Season 9, Kevin is absent on some episodes due to his bid to become leader of Canada's Conservative Party, and replaced by guest Sharks.
- Growing the Beard:
- Season 1 of the Canadian version was generally seen as a disaster, 2 an improvement with the addition of Arlene Dickinson and better pitches, with 3-5 generally seen as the best, due to the presence of Brett Wilson completing the fan-favourite group of Dragons.
- Likewise, Mark Cuban becoming a permanent fixture in Shark Tank by Season 3.
- On most versions, pitches tended to get better after a season or two because, by watching earlier episodes, many entrepreneurs had a better idea of how the show worked and how to handle themselves in front of the Dragons.
- Hilarious in Hindsight:
- In the 2011 Children in Need crossover with The Apprentice, Lord Sugar opens his pitch with "Four flights of bleeding stairs in a warehouse! Get a bleeding lift in!" In the 2013 series, the staircase through which entrepreneurs make their entrance was indeed replaced with a lift.
- In the same crossover, Lord Sugar's intentionally-ridiculous product (the wifi-enabled "AMSBear") is roundly mocked by the Dragons. Six years later, and something very similar's actually being sold.
- Memetic Mutation: [Insert phrase here], and for that reason I'm out.
- Moment of Awesome: Any time a pitch convinces the Dragons to go into a bidding war over the business in question.
- No Such Thing as Bad Publicity: Regardless of whether or not they get a deal, many companies that appear on the program get a boost in their sales simply from people hearing about the company on the show. And for those who don't get a deal on the show, they may get offers off-screen for investment. This is lampshaded regularly on Shark Tank when the Sharks believe someone is acting strange just to get publicity.
- Periphery Demographic: The show is popular family viewing in the UK, as there is nothing inappropriate for children to see, and it's inspirational. The British Dragons were rather surprised when they found this out.
- The Scrappy: A lot of people find narrator Evan Davis very irritating, and he was mocked thoroughly in The IT Crowd. This probably has to do with the fact that most of his narration consists of stating the obvious (which is presumably the fault of the producers), though his style hasn't exactly endeared many viewers. This is especially true of viewers of other versions, which typically have very limited narration.
- Barbara Corcoran, for always going out. Always.
- Chris Sacca, about whom one particularly nasty commenter said "Chris Sacca is a sacca shit".
- Seasonal Rot: Some of the original UK Dragons left when the producers wanted to focus less on encouraging entrants to make their currently half-baked but possible ideas into viable opportunities and more on telling them they were idiots. More recently, the show seems to have reached something of a compromise the Dragons encourage products that they aren't prepared to invest in but still feel to have some potential, while saving their scorn for truly stupid products.
- Technology Marches On: While looking at a bike helmet with integrated lights, Duncan Bannatyne asked whether cyclists would really want such a product since bike lights are typically powered off a dynamo attached to the wheel. The other dragons had to tell him that such lights had become outdated decades ago.
YMMV / Dragon's Den