The Critic's feud with The Angry Video Game Nerd (2004) started as a joke when the Critic complained about the Nerd's fans comparing them. Doug Walker didn't expect James Rolfe to acknowledge him, but when he stated on his site that he was a fan, Walker contacted him about keeping a feud going. This became one of the show's best-loved running gags, culminating in no fewer than three in-person confrontations between the Critic and the Nerd, and leading to a real-life friendship between Walker and Rolfe.
The first 14 episodes were recorded and produced in 2007 and posted on Doug Walker's YouTube page. When the videos were removed for legal reasons in 2008, Walker brought them to his own channel on ThatGuyWithTheGlasses.com, where he continued producing new Nostalgia Critic reviews on a weekly basis.
Doug Walker's favorite critics of all time are Gene Siskel and Roger Ebert. To show his appreciation of them, he made A Tribute to Siskel and Ebert (2009). Also, when Ebert died, he made Farewell to Roger Ebert (2013).
The Critic often uses the term "Big-Lipped Alligator Moment" to describe moments in movies that come right out of nowhere, have little to no bearing whatsoever on the plot, are way over-the-top in terms of ridiculousness even in the context of the movie, and after they happen, no one ever speaks of them again. This is named after a scene in the film Todos os Cães Merecem o Céu (1989), where a big-lipped alligator appears, has a random musical number, then is never mentioned again. Ironically, the term was originally coined by the Nostalgia Chick, not the Critic.
Throughout the course of one year, Doug Walker has developed laryngitis a total of 3 times, mainly because playing the Nostalgia Critic requires him to scream repeatedly. Also, the voice of Chester A. Bum puts a strain on his vocal chords.