Is happy and even proud of their Dark and Troubled Past, believing that their trial by fire makes them superior. This may make them cocky, but they usually have the savvy and muscle to back up their arrogance.
Puli, the nine-year-old leprous gang leader in the book Nectar In A Sieve, is deeply cynical and deeply proud of how hardened he's become. (He winds up saving the heroine with his skills, although he doesn't do anything for free.)
Briar Moss of the Circle of Magic starts out like this, and opens up as time goes on. He stays tough as nails, however.
Both Bean and his arch-enemy, Achilles, show elements of this, having spent their early years fighting to survive on the streets. Bean is more well-adjusted and doesn't seem to dwell on it much. Achilles turned out to be a complete sociopath who just CAN'T let anyone who has ever seen him in a position of weakness live very long. Part of his obsession with Bean seems to stem from just how frequently Bean has PUT HIM in positions of weakness.
Ferro Maljinn of The First Law. Her background went from war slave to harem mistress to murderous desert fugitive with a vendetta, but the core personality fits this trope spot on.
Hissune from Lord Valentines Castle is this, played straight in the novel itself, while in the sequel it's subverted as all hell, when Lord Valentine makes him a nobleman and eventually Valentine's successor as king of Majipoor.
Demetrios Makropolous in "A Coffin for Dimitrios" (filmed as "The Mask of Demetrios" with Peter Lorre, Sidney Greenstreet and Zachary Scott). Demetrios goes from poor fig packer to murderer, smuggler, assassin and spy.
Mickey Milkovich on Shameless (US). Still not out of his teens, he comes across as much older, is a pimp and assaults people whenever it suits him. Much of this stems from his harsh upbringing under his violent and erratic father and his family's general involvement in criminal activity, which is nonetheless not very lucrative, as they are fairly poor. That Mickey's father Terry is brutally homophobic (probably due to experiences during his many stints in prison) and Mickey is a Gayngster also contributes to his must-kick-ass-to-survive mentality.
Selina "Cat" Kyle in Gotham. She uses Jim Gordon to stay out of juvie, but has no interest in him finding her kind of better life, and seems quite happy in her career as a pickpocket.
It's very common for up-and-coming Mixed Martial Arts fighters to point to their rough childhood as evidence of their toughness and commitment. More experienced fighters tend to shift their focus towards their professional accomplishments.
Iconic character Dai Blackthorn from GURPS is based on this archetype.
A very common PC background, especially for characters with stealth or other 'thief' abilities. Because living family is basically bait for a GM to kidnap them and force you to rescue them, but angst annoys the other players, an orphan or abandoned child that's not particularly broken up about it is a good way to avoid your character's backstory interfering with the campaign.
The "Earthborn" origin for Shepard implies Shepard used to fit this archetype (or still does, if you play an unapologetic renegade path). In the first game, Shepard can even run into a friend from his/her old gang.
Quain'tana of Drowtales grew up on the streets with no apparent parents and eventually rose to be one of the greatest war leaders in the worldsetting. Her first "pack" was composed of other street rats that eventually grew into a mercenary empire, but unlike other examples her lack of parental figures really takes its toll on her children.
Doc Worth from Hanna Is Not a Boy's Name partly fits: he has the less-than-legal job and is proud of it and his dingy place. It is unknown what his chidhood or relationship with his family were like, but they were well-off enough to pay off hi med school expenses.
Gail Swanson, the Villain Protagonist of When She Was Bad, who lived on the streets for a time between running away from an Orphanage of Fear and joining a gang. The skills she learned during that time make her a significantly better fighter than her heroic counterpart Amber, and she vigorously defends the gang leader who took her in against any moral criticism.
Mimeo of the Whateley Universe. His childhood consisted of being a numbers runner on the streets of New York City, right up until he was told to kill some people or be killed. He gained superpowers and managed to avoid the problem, by putting his father and two assassins in the hospital. He's a super villain who will do pretty much anything except kill people, and he has selfish reasons for holding back on that account.
Aladdin from the Disney 1992 film Aladdin is a proud and resourceful street rat who has no qualms about stealing to survive.
Megatron of Transformers Prime wears his life as "a gladiator from the pits of Kaon" as a badge of pride despite the fact that he was a slave because of it.
In Avatar The Last Airbender, Zuko (before his "World of Cardboard" Speech) believes that his psychotic father somehow made him stronger, despite the fact that said father burned Zuko's face and banished him for speaking out of turn. Zuko says this in the first season: "I don't want luck, I don't need it. I've always had to fight and struggle. It's made me strong, it's made me who I am." It's made clear, though, that a lot of his pride at his past is him lying to himself, as he doesn't want to acknowledge that Ozai is evil.
Very common in most countries to be proud of having worked yourself out of a Gangsterland neighborhood or some other tough lifestyle.
Many gladiators came to embrace the lifestyle and adoration of the crowd. If such a thing existed today, (or if they allowed such to compete in the NFL) it would be similar to a prison football team wanting life in prison because of all the fans they get by actually being the prison's football team.