The presenters also love making puns and jokes related to the contestants profession.
Badass Decay: Some series feature a contestant who starts off brilliantly, getting scores usually not seen until the later stages as early as week 3, who then runs out of steam and is usually eliminated before the final. Austin Healy from series 6 and Scott Maslen from series 7 both spring to mind.
Designated Villain: Craig is styled as "the mean one", but will usually try to end on a positive note and can be very nice when he genuinely likes something (the simple "Fab-u-lous!" being the show's most prized accolade). He is in fact many people's favourite judge.
All the judges have a tendency to get booed when they make negative comments no matter how nice they are about it.
8.8: Alesha Dixon giving her obvious favourite, Harry Judd of Mc Fly, 10 as early as week 4.
It is the norm for a season to have at least one. Season 2 is unique in that the worst dancer usually was eliminated every week, although you could still count Julian Clary.
Christopher Parker in Season 1.
Fiona Phillips in Season 3.
Season 6 had both Lisa Snowdon and John Sergeant. Snowdon was rescued from the dance-off three times and yet was the first eliminated in the final. Sergeant is probably the show's most famous example. He ended up playing his own ineptitude for comedy and repeatedly dodged the bottom two. He eventually withdrew, saying that "There is now a real danger that I might win the competition. Even for me that would be a joke too far."
Judy Murray took this to new levels in Season 12. She would continue to receive bottom marks from the judges and yet would be saved by the public vote every week. Eventually the judges just stopped sugar coating their criticisms. When she finally was eliminated, they called it a Mercy Kill.
Ed Balls in Season 14. In contrast to some of the examples above, he did genuinely strive to improve with each week, and managed at least one genuinely credible dance.
Ensemble Darkhorse: John Sergeant in the 2008 series, who set half of Britain on fire with controversy as the public kept voting him back in when the judges...er...strongly criticised him, shall we say.
Chris Hollins, one of 2009's dark horses, won the competition over Ricky Whittle and Ali Bastian, both of whom had been frontrunners since week 1 and were rather more technically skilled (this is not to say that Chris is terrible technically, but he is rather more on the 'performer' side of Technician vs. Performer).
And then there was Christopher Parker, from the first series. Pretty much dire, got into the final anyway. Possibly because he did a Paso Doble in the style of Dracula.
Kelly Brook in the 2007 series; prior to that she had been regarded as quite good looking but utterly talentless by just about everyone in Britain. When she appeared on the show however, she actually proved to be a very good dancer; maybe not good enough to actually win that year's prize (she dropped out near the end of the series after her father died), but her performance was still pretty impressive by any standards.
Chelsee Healey, much like Kelly Brook she had bags more talent than would've been expected, however the judges paid little attention to her as a competitor until relatively late in the contest.
Ho Yay: The male professionals. They're dancers, they can't help it.
Special mention goes to Robin and Artem, who lived together for the 2010 series.
Lest we forget that unexpected moment between Gavin and Bruno in series 8.
Artem and James. Doing the Rumba.
And on the Wembley show in 2011, a VT consisting of Artem being more interested in dancing recently booted professional, Brendan Cole than his own sexy partner (Holly Valance).
Artem and James again on the Botafogo Challenge final. They came down the ITT stairs holding hands, Artem attempted to hug James twice...let's face it, every time Artem interacts with other male pros, this trope comes into effect.
Tess Daly's flirty presenting style sometimes leads to this with female contestants.
Lowest Common Denominator: People vote for "contestants" who are not good because they are funny or entertaining, despite the fact that the show is sold as a Dance Competition, not an Entertainer Competition.
Gavin Henson got through to the semi-finals, based on... well. Use your imagination.
No Sense of Personal Space: When the contestants go to the judge's table after a dance, Tess doesn't seem able to stop from holding their hand or touching them in some way.
Portmanteau Couple Name: Tends to happen to the more popular couples; e.g Chris Hollins + Ola Jordan = Cola. They even had matching "Team Cola" t-shirts made up once the name started to catch on.
Replacement Scrappy: Alesha Dixon replacing Arlene Philips as a judge was met with some controversy - that the BBC were discriminating against older women on TV. Alesha did manage to get Rescued from the Scrappy Heap for some, proving to be a good and fair judge. Perhaps in response to the controversy, when Alesha left to become a judge on Britain's Got Talent, her replacement was then-43 year old Darcey Bussell.
Romance on the Set: A number of celebs have ended up in relationships with their professionals. They haven't tended to last and it's become somewhat of a Running Gag to the British media. When Kimberley Walsh appeared on the Jonathan Ross Show to promote her season on the show, he was indignant that none of that season's contestants were having affairs.
The Scrappy: Regularly any given series will have at least one pair who are notably sub-par but survive elimination week after week while better dancers get kicked out. While some are saved in the viewers' esteem by being particularly entertaining or charming, individual reactions vary widely. Candidates include Ann Widecombe, John Sergeant, Kate Garraway, Gavin Henson, Nancy Dell'Olio, Christoper Parker and Judy Murray.
Jimi Mistry who was eliminated in week six, the same week he had gotten the best score of the season.
Pixie Lott who was eliminated by Len Goodman despite receiving top marks nearly every week. That was her only week in the dance-off too.
The Woobie: Craig Kelly in the 2009 series. He lasted one week after one of the better dancers (Zoe Lucker) in the competition had a shocking exit (or not so shocking, considering she was paired with James Jordan, the unluckiest professional ever) and the judges tore him, specifically, to pieces. Even though it wasn't actually his fault that Zoe had left, it was the fault of the voting audience. In his hometown, which he'd been saying for the last four weeks that he would do anything to get to (one of the shows that year was filmed in Blackpool Tower Ballroom).