The t-shirt should have tipped you right off. Although it may have been when he was described as Scottish.
Mark Millar is a prominent Scottish writer of comic books. Millar has written for many a character, particularly those within the Marvel Universe, as well his own creations in the form of Wanted, Kick-Ass and so forth.Millar's writing style is known for pretty much taking the concept of Darker and Edgier and letting itoff the leash. His stories involving popular superheroes are sometimes cynical, forcing heroes to deal with darker moral themes than usual. On the other hand, some of Millar's earlier super-hero work (on Superman Adventures) and even some of his more recent projects like 1985are more optimistic in tone. He also runs his own little slice of the internet known as MillarWorld, a comic news/forum where he's more than happy to dole out his opinion on whatever, and has been involved with charity work for children with disabilities.Similar to other comic book writers and artists known for dark and gritty subject matter, he's got a significant Hatedom, with many resenting his writing for its sociopathic take on characters and often focusing on their worst character traits, as well as his tendency to mock and insult his audience. He's got a Misaimed Fandom as well, with folks who cherish characters Word of Godsays are meant to be seen as completely insane. Despite that, there's a number of fans who enjoy his grittier take on superheroes and darker subject matter, and his comics frequently sell very, very well.Not to be confused with Frank Miller or Mark Miller.Selected bibliography:
This article suggests that all of his later Marvel works (1985, Fantastic Four, Kick-Ass, and Old Man Logan) is all interconnected. (Three of those are automatically canon to each other anyway, of course, but Kick Ass is more of a surprise.)
Even earlier he estabilished connections between three comics published by different companies - Wanted, Chosen and The Unfunnies. The reason why at the end of the Chosen media doesn't report Antichrist's miracles is that they're controlled by supervillains from Wanted. And Troy Hicks from Unfunnies helped Satan rape Antichrist. Never published Run! was supposed to be set in that world too.
Zauriel was created by him and Grant Morrison as a stand-in for Hawkman, who had been retconned so badly that he was unusable. Morrison made it a point to lampshade this so readers would get the point, too. The first time he sees Zauriel, Aquaman momentarily mistakes him for Hawkman. Later on, Superman invites him to join, saying, "there's always room in the Justice League for, well...a big guy with wings like you."
Wanted. Originally it was a Legion of Doom Reboot and got shut down. So he made it Darker and Edgier and changed the names. It's really obvious who most of the characters are supposed to be.
The Authority faced off against Ersatzes of classic Marvel heroes in his inaugural arc. The Americans were obviously Avengers pastiches with named ones being the Commander (Captain America), Tank Man (Iron Man), Hornet (Wasp) and Titan (Giant Man) while the rest were clearly based on Thor, Hulk, Black Panther, Scarlet Witch, Hawkeye, and the Vision. Later, they took down unnamed Ersatz teams resembling the X-Men, The Inhumans, Fantastic Four (with additional Silver Surfer, Galactus, Watcher and H.E.R.B.I.E. knock-offs, all of which are most famously associated with the FF) and the Howling Commandos while other Wildstorm heroes fought Ersatzes of Spider-Man, The Punisher, Daredevil, Elektra, Doctor Strange, Namor and others. The story's Big Bad, Jacob Krigstein, was an evil ersatz Jack Kirby.
Except it's worse than our world, because it's our world secretly ruled by a conspiracy of supervillains, who can do everything they want, we have no power to change the situation and it wasn't always this way. At least our world isn't (I hope)
And even worse, Wanted shares the world with two other comics - Chosen and The Unfunnies. So it means that The president of the United States is an Anti Christ and Satan is very real and actively trying to bring the Apocalypse and that people can enter the worlds they wrote by switching places with their characters, exposing completely innocent beings to general crappiness of their world.
In Kick-Ass, two characters become superheroes: the title character because he wants to help people... and in a straighter version of this trope, Big Daddy because he was frustrated with his marriage and thought his life was boring. He even creates a fake Back Story to enhance his new identity.
This is the basic idea of Wanted, both the original comic and the movie adaptation. The protagonist is a loser guy who becomes a Bad Ass when he finds out he has a badass gene inherited from a father he never knew. The comic book (but not the movie) also attempts to deconstruct this trope by scolding the reader for identifying with the main character, who's essentially a violent sociopath.
Kick-Ass starts with repeated uses of this, but moves away from reality as the story continues.
The second issue of Superior has a kid testing out the superpowers of his favorite Superman Expy. He attempts to use his "super-breath" to put out a house fire, only to demolish the house and spread the fire over a much larger area.
In the same issue it even deconstructs the concept of a Rag Tag Bunch Of Misfits by showing how badly a group of people, inexperienced at superheroing, with the exception of one, performs during their first outing as superheroes.
Shout-Out: Early in his career, he did a stint writing Sonic the Comic. He credited this gig with helping to pay for his wedding, and thus there are references to Sonic in several of his works, including Secret History of the Authority and Wanted mini-series.
Kick-Ass is about as cynical as it gets, even more so than Watchmen. Dave is a loser, Big Daddy is a complete fraud, Hit Girl is lied to by her father about her mother dying, and not allowed to have a normal childhood, and everyone else except for maybe Dave's father is a scumbag of one sort or the other (Katie is a shallow bitch, Red Mist is completely unsympathetic unlike in the film, his father is a evil, etc). Despite all this, it's incredibly funny. Many people preferred the movie adaptation since it toned down the utter bleakness of the comic book, but taken on its own terms, the comic is a great Black Comedy.
His other most famous work was Wanted which also falls in the far end of the Cynical side as well as The Authority.
Probably the one book he did that falls squarely on the idealistic side is Superior, a book about a 12-year-old boy suffering from multiple sclerosis who gets super powers, loses them, and in the process, learns to come to terms with his disability.
He hated Bill Clinton, and so in his run on The Authority and the Jenny Sparks mini-series had several jabs against him. One of the issues of the mini-series even goes so far as to implicitly compare Clinton to Adolf Hitler.
One of the supporting characters in Marvel 1985 is an obnoxious Hipster who keeps talking about how stupid people who like superhero comics are, and how the only good comics are indie fare like Cerebus and Love And Rockets. Accordingly, you can imagine how humiliated he is when Iron Man saves his ass near the end of the book.
After he left Ultimate Comics, a continuation of his title The Ultimates was given to Jeph Loeb, who created the terrible Ultimates 3 and the even worse Ultimatum. After that he returned to writing comics in Ultimate Universe. The very first page of his Ultimate Comics Avengers starts with Nick Fury looking at the mess caused by Ultimatum and saying "What the #$%^&? I leave for ten minutes and everything goes to hell." He gives another one towards Loeb (and possibly towards mainstream Marvel) in issue four of Ultimate Avengers vs New Ultimates. Tony Stark gives ten million dollars to charity in exchange for Thor promising to talk like a normal person again. He started using the whole "Faux Shakespearean" thing during Loeb's run.
You Bastard: He likes this trope almost as much as he hates his readers, whom he's argued use comic-book violence as a substitute for the emptiness and meaninglessness of their lives. Wanted is particularly explicit about this.